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- 104 (barge)
- 115 (barge)
- 129 (barge)
- 2015 Russian submarine wreck discovery
- A (motor yacht)
- Russian submarine AG-22
- Ottoman battleship Abdül Kadir
- Abdülhamid Han
- ABISMO
- SS Abukir
- Japanese cruiser Abukuma
- USS Achelous
- Acheron-class torpedo boat
- HMS Achilles (1905)
- French corvette Aconit
- HMS Active (1758)
- USRC Active (1791)
- USRC Active
- HMS Adamant (1780)
- Adelaide Steamship Company
- Australian steamer Adele
- Admiral-class battlecruiser
- Admiral Lazarev-class monitor
- Russian cruiser Admiral Makarov
- SMS Admiral Spaun
- Admiral Spiridov-class monitor
- HMS Adventure (1771)
- Adventure Galley
- HMS Aeolus (1801)
- HMS Agamemnon (1781)
- English ship Aid (1562)
- HMS Aigle (1801)
- French submarine Aigrette
- Air lock diving-bell plant
- List of aircraft carrier classes of the United States Navy
- Aircraft maintenance carriers of the Royal Navy
- Alabama Drydock and Shipbuilding Company
- Brazilian monitor Alagoas
- Alameda Works Shipyard
- HMS Alarm (1758)
- Alaska Steamship Company
- USS Albany (1846)
- Albatros (1899)
- German torpedo boat Albatros
- HMS Albemarle (1779)
- HMY Alberta
- HMS Alceste (1806)
- HMS Alcmene (1794)
- HMS Aldborough (1727)
- HMS Aldenham
- French corvette Alecton
- Aleksandr Suvorov (ship)
- CS Alert (1890)
- HMY Alexandra
- Alf (barque)
- Italian monitor Alfredo Cappellini
- HMS Algerine (J213)
- SS Algoma
- USAHS Algonquin
- HMS Alligator (1787)
- Alligator (steamboat)
- French ironclad Alma
- Alma-class ironclad
- MS Almariya
- SS Almeria Lykes (1940)
- Chilean battleship Almirante Latorre
- Almirante Latorre-class battleship
- SS Alpena (1942)
- USS Alpine
- Aluminaut
- Alvin Clark (schooner)
- Amagi-class battlecruiser
- Japanese aircraft carrier Amagi
- Italian cruiser Amalfi
- Amaryllis (ship)
- HMS Amazon (1799)
- Amazon (yacht)
- French submarine Amazone (1916)
- HMS Ambrose (1903)
- SS American (1900)
- American Holland-class submarine
- SS American Legion
- American President Lines
- HMS Amethyst (1873)
- French cruiser Amiral Charner
- Amphibious warfare ships of Australia
- HMS Amphion (1911)
- Amphitrite-class monitor
- Amur-class minelayer (1898)
- Anadolu Shipyard
- SS Andaste
- Russian battleship Andrei Pervozvanny
- Andrei Pervozvanny-class battleship
- Andrew Jackson (clipper)
- Animals aboard the Titanic
- Anna Karoline
- HMS Anne Galley
- HMS Anne (1915)
- SS Anselm (1935)
- HMS Anson (79)
- Anthony Roll
- Antikythera wreck
- Antoinette (barque)
- HMS Apollo (1799)
- Aqua Luna
- SS Aquarama
- Brazilian battleship Aquidabã
- Aquilo (steam yacht)
- HMS Aquilon (1758)
- Arabia (steamboat)
- HMS Archer (D78)
- SS Archimedes
- Archipelago fleet
- Argentine–Chilean naval arms race
- MV Argo Merchant
- French submarine Argonaute (1905)
- HMS Argus (I49)
- INS Arighaat
- English ship Ark Royal (1587)
- HMS Ark Royal (1914)
- Arleigh Burke-class destroyer
- French ironclad Armide
- French submarine Armide
- Arniston (East Indiaman)
- SMS Árpád
- HMS Arpha
- HMS Arrow (H42)
- Arthur Middleton-class attack transport
- HMS Artifex
- Asama-class cruiser
- Japanese destroyer Asashio (1936)
- MV Ascension
- USRC Ashuelot
- USS Askari
- SS Assyrian (1914)
- MS Astor
- HMS Astraea (1893)
- Astraea-class cruiser
- STV Astrid
- HMHS Asturias
- French ironclad Atalante
- MV Atheltemplar
- Athenian sacred ships
- MS Athina B
- SS Atlantic Causeway
- SS Atlantic Conveyor
- USS Atlas (ARL-7)
- GSP Atlas
- Attack-class submarine
- Attacker-class escort carrier
- HMS Audacious (1869)
- SS Augusta Victoria (1888)
- Auk-class minesweeper
- Texan sloop-of-war Austin
- HMAS Australia (1911)
- Australian light destroyer project
- Autonomous spaceport drone ship
- SS Ava (1855)
- HMS Avenger (D14)
- SS Avondale Park
- MV Avrasya
- BOKA Vanguard
- SMS Babenberg
- HMS Bacchante (1876)
- SMS Baden
- HMS Badger (1777)
- HMS Badsworth
- Brazilian cruiser Bahia
- Balangay
- Spanish cruiser Baleares
- SS Baltic (1850)
- CSS Baltic
- Baltimore Steam Packet Company
- USS Banner (APA-60)
- Italian submarine Barbarigo
- Barnegat-class seaplane tender
- USS Barnstable
- SS Barøy (1929)
- Brazilian ironclad Barroso
- HMS Basilisk (H11)
- SS Batavier II (1897)
- Batavier Line
- SS Batavier V (1902)
- Batillus
- United States Battleship Division Nine (World War I)
- Battleship Illinois (replica)
- Battleship Row
- SS Baxtergate
- Russian cruiser Bayan (1907)
- HMS Bayano (1913)
- SMS Bayern
- Bayern-class battleship
- USS Bayfield
- Beacon-class gunvessel
- HMS Beagle (1804)
- HMS Beagle (H30)
- CSS Beaufort
- French ship Beaumont (1762)
- SS Beaverburn (1944)
- HMT Bedfordshire
- MV Belgian Airman
- RV Belgica (1884)
- Belitung shipwreck
- Bellamya
- Belle of Temagami
- HMS Bellerophon (1786)
- French ironclad Belliqueuse
- Belorussiya-class cruiseferry
- Belyana
- SS Ben Doran
- SS Benalbanach (1946)
- HMS Benbow (1913)
- USS Bennington (PG-4)
- SS Bergensfjord
- Berkshire No. 7
- Bethlehem Hingham Shipyard
- USS Bexar
- Bird-class patrol vessel
- Birely, Hillman & Streaker
- SS Birma
- MV Biscaglia
- USS Black Arrow
- Black Terror (ship)
- HMS Blackcock
- SS Blairspey
- HMS Blanche (1786)
- HMS Blanche (H47)
- SMS Blücher
- USS Bollinger
- English ship Bonaventure (1567)
- HMS Bonaventure (F139)
- HMS Bonne Citoyenne (1796)
- Booya (ship)
- USS Borie (DD-215)
- Borodino-class battlecruiser
- SS Bosnia (1898)
- Botik of Peter the Great
- USS Bottineau
- HMS Braak (1795)
- HNoMS Brand (1898)
- Brandenburg-class battleship
- Brandenburg Navy
- SMS Brandenburg
- SMS Braunschweig
- Brazilian cruiser Almirante Barroso (1882)
- List of breastwork monitors of the Royal Navy
- Dutch ship Brederode
- SMS Bremse
- SMS Breslau
- SS Brighton (1903)
- Bristol (1866 steamboat)
- Bristol Packet Boat Trips
- British B-class submarine
- SS British Corporal
- SS British Drummer
- British Wreck Commissioner's inquiry into the sinking of the Titanic
- Briton-class corvette
- Russian monitor Bronenosets
- SS Broompark
- Brother Jonathan (steamer)
- SS Brussels
- Texan schooner Brutus
- HMS Bryony (K192)
- Bucentaur
- SMS Budapest
- Bugaled Breizh
- French cruiser Bugeaud
- Bulbous bow
- SS Bulgaria (1898)
- Bulldog-class survey vessel
- MV Butiraoi
- Byford Dolphin
- C and D-class destroyer
- CURV
- Italian battleship Duilio
- Caleb Grimshaw
- USS Callaway
- HMS Calliope (1884)
- HMS Calpe (L71)
- RMS Cameronia
- Canaanite shipwreck
- HMS Canopus (1798)
- HMNZS Canterbury (F421)
- SS Cap Tafelneh
- Chilean battleship Capitán Prat
- HMS Carcass (1759)
- Cargo control room
- HMS Carlisle (D67)
- Italian cruiser Carlo Alberto
- Carnegie (yacht)
- Carrier Pigeon (ship)
- Carrier Strike Group 3
- Carrier Strike Group 9
- Carrier Strike Group 14
- SS Carsbreck
- USS Carteret
- HMS Carysfort (1766)
- HMS Carysfort (1836)
- Casco-class monitor
- PS Castalia
- HMS Castor (1785)
- Castore-class gunboat
- SS Catalina
- SS Cayuga
- USS Cecil
- SS Cedarville
- RV Cefas Endeavour
- MV Cemfjord
- French ship Censeur (1782)
- HMS Centurion (1774)
- HMS Ceres (D59)
- Chain boat
- CS Chamarel
- CHANT (ship type)
- HMS Chanticleer (1808)
- Fredrik Henrik af Chapman
- French battleship Charlemagne
- Charlemagne-class battleship
- HMNZS Charles Upham
- SS Charles W. Wetmore
- SS Charlotte Cords
- Charodeika-class monitor
- French cruiser Chasseloup-Laubat
- HMS Chatham (1812)
- INS Chennai (D65)
- Cheslakee
- Russian battleship Chesma (1886)
- SS Chester A. Congdon
- Chester–Hadlyme Ferry
- Chester Rolling Mill
- SS Cheviot
- HMS Chichester (1785)
- USCGC Chincoteague (WPB-1320)
- Japanese cruiser Chitose
- SS Choctaw
- ROKS Choe Yeong (DDH-981)
- SS Christopher Columbus
- Cinque Ports (1703 ship)
- USCGC Citrus
- City of Poros ship attack
- SS City of Tokio
- SS City of Cairo
- SS City of Chester
- City of Detroit III
- PS City of Erie
- City of New York (1885 ship)
- SS City of Peking
- City of Ragusa
- City of Seattle (steamship)
- City of York (barque)
- SS Clan Alpine (1942)
- SS Clan Mackinnon (1945)
- SS Clan Matheson (1919)
- Clara Clarita
- HMS Cleopatra (1779)
- Cleopatra's Barge
- French frigate Cléopâtre (1838)
- SS Clifton
- USS Clifton (IX-184)
- Clyde (1871 ship)
- USCGC Cobb
- USS Cobbler
- HMS Cockchafer (1915)
- USS Cocopa
- HMS Codrington
- MV Coelleira
- HMS Colchester (1744)
- Colonel Wright (sternwheeler)
- USS Colorado (BB-45)
- Colorado-class battleship
- Columbus (1824 ship)
- Italian submarine Comandante Cappellini
- SS Comet (1857)
- French seaplane carrier Commandant Teste
- List of commanding officers of USS Oklahoma (BB-37)
- Commodore Cruise Line
- SS Commodore (collier)
- HMS Concorde (1783)
- Concordia (1696 ship)
- USS Connecticut (BB-18)
- HMS Constant (1801)
- Constanța Shipyard
- SS Conte Grande
- Continental Iron Works
- Corozal (dredger)
- USS Cortland
- MS Costa Allegra
- Costa Concordia disaster
- Costa Deliziosa
- Courageous-class battlecruiser
- Courageous-class aircraft carrier
- French ship Courageux (1753)
- French battleship Courbet (1911)
- Courbet-class battleship
- French frigate Créole (1797)
- USS Crescent City
- Crescent City-class attack transport
- HMS Crescent (1784)
- HMS Cressy (1899)
- Crichton-Vulcan
- Crow's nest
- SS Crown Arun
- Australian Army ship Crusader (AV 2767)
- MS Cunard Princess
- HMS Curlew (1812)
- SMS Custoza
- Cybele-class mine destructor vessel
- HMS Cyclops (1871)
- Cyclops-class monitor
- Cymric (schooner)
- SS Czar
- SS Dakotan
- Dalarö wreck
- Dalmat (yacht)
- HMS Danae (D44)
- Daniel Webster (steamboat)
- Danmark (ship, 1932)
- Italian battleship Dante Alighieri
- Daresbury (Mersey flat)
- Dark-class patrol boat
- Davara
- HNLMS De Ruyter (1901)
- Decarbonization of shipping
- DeepFlight Super Falcon
- HMS Defence (1861)
- Defence-class ironclad
- Delaware River Iron Ship Building and Engine Works
- Greek submarine Delfin (1912)
- French battleship Démocratie
- United States floating battery Demologos
- Brazilian coastal defense ship Deodoro
- Deptford Dockyard
- SMS Derfflinger
- French cruiser Descartes
- Descubierta and Atrevida
- Design 1047 battlecruiser
- SMS Deutschland (1904)
- Deutschland-class battleship
- USS Diachenko
- HMS Diamond (H22)
- French battleship Diderot
- Dido class cruiser
- SS Dieppe (1905)
- SS Dimitry Laptev
- Dispatch (sternwheeler)
- Dix (steamboat)
- Russian ship Dmitry
- Dodi Princess
- Dogger (boat)
- German ship Doggerbank
- MV Domala
- QSMV Dominion Monarch
- HMS Donegal (1798)
- HMS Donegal (1858)
- SS Dongola
- SS Doric (1883)
- HMS Dorsetshire (40)
- HMS Doterel (1808)
- HMS Doterel (1880)
- Double-hulled tanker
- SS Dronning Maud (1925)
- HMS Druid (1869)
- PS Duchess of Norfolk
- PS Duchess of Fife (1903)
- Duke of Edinburgh-class cruiser
- HMS Duke of Kent
- SS Dumbo
- HMCS Dundas
- USS Dunderberg
- Dunedin (ship)
- RMS Dunottar Castle
- Spanish ironclad Duque de Tetuán
- HMS Durban
- Dutch 1913 battleship proposal
- Russian battleship Dvenadsat Apostolov
- SS Dwinsk
- SS Dzhurma
- E5 Project
- HMS E13
- USS Eagle 56
- USRC Eagle
- Early naval vessels of New Zealand
- Earth 300
- SS Eastern
- SS Edenton
- HMS Edgar (1779)
- French cruiser Edgar Quinet
- Edgar Quinet-class cruiser
- Russian monitor Edinorog
- Edmond (1833)
- HMCS Edmundston
- SS Edward L. Ryerson
- Effie M. Morrissey
- Égyptienne (ship)
- Russian battleship Ekaterina II
- Ekaterina II-class battleship
- Russian submarine Ekaterinburg (K-84)
- SS El Occidente
- SS El Oriente
- SS El Sol
- SS El Grillo
- USS Elcano
- MFV Elinor Viking
- SS Elisabethville (1921)
- Ellen Southard
- SS Ellengowan
- Elmer S. Dailey
- HMS Emerald (1795)
- Emma (1828 ship)
- SS Emperor
- SS Empire Abbey
- MV Empire Abercorn
- SS Empire Adur
- SS Empire Advocate
- SS Empire Arnold
- SS Empire Arthur
- SS Empire Bay
- SS Empire Beatrice
- SS Empire Blessing
- SS Empire Bowman
- SS Empire Boy
- SS Empire Candida
- SS Empire Cedric
- SS Empire Celia
- SS Empire Clansman
- SS Empire Cloud
- SS Empire Conveyor
- SS Empire Darwin
- MV Empire Dawn
- SS Empire Deed
- SS Empire Defender
- MV Empire Drum
- SS Empire Dryden
- SS Empire Duke
- SS Empire Morn
- SS Empire Simba
- HMS Empress (1914)
- HMS Endeavour (1694 bomb vessel)
- HMS Endymion (1865)
- HMS Engadine (1911)
- Enterprise (1855)
- HMS Enterprise (1864)
- SS Ernst Brockelmann
- Ersatz Monarch-class battleship
- Ersatz Yorck-class battlecruiser
- MT Botaş FSRU Ertuğrul Gazi
- Ottoman frigate Ertuğrul
- SMS Erzherzog Albrecht
- SMS Erzherzog Franz Ferdinand
- SMS Erzherzog Ferdinand Max
- SMS Erzherzog Friedrich
- SMS Erzherzog Karl
- Erzherzog Karl-class battleship
- HMS Esperance (1795)
- French destroyer Espingole
- HMCS Esquimalt
- Estrella de Chile (ship)
- USS Eten
- Etna Iron Works
- Etna-class cruiser
- HMS Europa (1765)
- MS Europic Ferry
- French brig Euryale (1863)
- HMS Euryalus (1901)
- Russian battleship Evstafi
- Exercise Strikeback
- Experiment (horse-powered boat)
- HMCS Eyebright
- Italian monitor Faà di Bruno
- Factory ship
- SS Fanad Head
- Fatih (drillship)
- French submarine Favorite (Q195)
- Spanish ship Fenix (1749)
- SS Fernebo
- HMS Ferret (1940 shore establishment)
- SS Ferret
- USS Ferret (1822)
- Festival Cruises
- HMS Fifi
- Fin
- HMS Finisterre (D55)
- USS Firebolt
- First ten Revenue Service cutters
- Fishing vessel
- USS Fiske (DE-143)
- HMS Flamborough (1707)
- Fleet-class unmanned surface vessel
- Flight deck cruiser
- Floating Battery of Charleston Harbor
- Florida-class battleship
- Flyer (steamboat)
- HSwMS Folke
- HMS Formidable (67)
- SS Fort La Montee
- SS Fort Stikine
- RMS Fort Victoria
- HMS Foudroyant (1758)
- French battleship France
- SS Francisco Morazan (1922)
- USS Frank Knox
- SS Franz Fischer
- USS Frederick Funston
- Frederick Funston-class attack transport
- French submarine Doris (1927)
- SMS Friedrich Carl (1867)
- SMS Friedrich der Grosse (1911)
- German weather ship WBS 3 Fritz Homann
- HMS Frobisher (D81)
- Frolic-class gunvessel
- French destroyer Fronde
- Fuji-class battleship
- Fulmar (1868)
- French submarine Fulton
- HMS Furieuse (1809)
- HMS Furious (47)
- HMS Fury (H76)
- Japanese ironclad Fusō
- Fusō-class battleship
- G-5-class motor torpedo boat
- MT GDF Suez Neptune
- MS GNV Cristal
- GSI Mariner
- GSP Saturn
- Galathea expeditions
- Galați shipyard
- Galilee (ship)
- HMS Gallant (H59)
- SS Gallic (1918)
- HMCS Galt
- Russian ship of the line Gangut (1825)
- Russian battleship Gangut (1911)
- Gangut-class battleship
- HSwMS Garmer
- USS Garrard
- USS Gasconade
- SS Gasfire
- French battleship Gaulois
- MV Gay Viking
- Gay-class patrol boat
- Gazelle-class cruiser
- Russian frigate General Admiral
- General Frisbie (steamship)
- USRC General Green
- USNS General Hoyt S. Vandenberg
- CSS General M. Jeff Thompson
- USS General R. L. Howze
- USS General S. D. Sturgis
- USS General Taylor
- USS Geneva
- USS George Clymer
- George Roper (ship)
- SS George Washington Carver
- MS Georges Philippar
- SS Georgiana
- Russian battleship Georgii Pobedonosets
- German aircraft carrier I (1942)
- MV Geysir
- Ghost Ship of Northumberland Strait
- Gilliam-class attack transport
- Italian cruiser Giovanni Bausan
- HHS Glasgow
- HMHS Glenart Castle
- HMS Gloucester (1654)
- Golar Spirit
- Golden Bear (ship)
- MS Golden Princess
- SY Gondola
- HMS Good Hope (1901)
- SS Goodleigh (1928)
- HMS Gorgon (1914)
- Gorgon-class monitor
- USS Goshen
- SS Gothenburg
- SS Governor Cobb
- SS Grampian
- Grande Tema incident
- Grangemouth Dockyard Company
- HMS Grasshopper (T85)
- Gravina (clipper)
- Great Lakes Shipwreck Museum
- Great Steamboat Race
- Great Tea Race of 1866
- Great Western Railway ships
- USS Grebe
- HMS Greenwich (1747)
- HMS Grenade (H86)
- HMS Greyhound (H05)
- Gribshunden
- SS Gripfast
- Grom-class destroyer (1939)
- Russian cruiser Gromoboi
- SMS Grosser Kurfürst (1913)
- V25-class torpedo boat
- BAE Guayas (BE-21)
- Guerrero (ship)
- SS Gulfamerica
- Gunilda
- Guêpe-class submarine
- HMS Entreprenante (1801)
- HMS Trent (1796)
- SMS Habsburg
- Habsburg-class battleship
- SS Haimun
- HMCS Halifax (K237)
- Halsewell (East Indiaman)
- Hamburg Atlantic Line
- Hannah (1849 shipwreck)
- SMS Hannover
- MS Hans Hedtoft
- SMS Hansa (1872)
- Hansa Carrier
- Edward Harland
- Harris-class attack transport
- Japanese battleship Haruna
- HMS Harvester (H19)
- Harwich Force
- HMS Hasty (H24)
- Japanese destroyer Hatsukaze
- HMS Havelock (H88)
- MV Havengore
- MV Havila Harmony
- Havmanden-class submarine (1911)
- USS Hawaii (CB-3)
- Graham Hawkes
- HMS Hector (1862)
- HMS Hector (F45)
- Hector-class ironclad
- HNoMS Heimdal (1892)
- SMS Hela
- SMS Helgoland (1912)
- SMS Helgoland (1909)
- USS Helianthus
- Helix Producer 1
- Greek frigate Hellas
- Hemmema
- SS Hennepin
- French battleship Henri IV
- Henry Eckford (steamboat)
- USS Henry R. Mallory
- SS Henry
- USS Herald (1798)
- Hercules (1970 ship)
- Herring buss
- Herzogin Cecilie
- Heywood-class attack transport
- Japanese battleship Hiei
- Japanese ironclad Hiei
- High Seas Fleet
- HMS Highlander (H44)
- HMS Hinchinbrook (1778)
- SS Hispania (1912)
- Histria Perla
- Hitachi Zosen Corporation
- French ironclad Hoche
- HMS Holland 5
- HNoMS Honningsvåg
- MV Horizon-1
- Japanese aircraft carrier Hōshō
- HMS Hostile (H55)
- HMS Hotspur (H01)
- Hughes Bolckow
- USS Hunchback
- USS Hunter Liggett
- HMS Hurricane (H06)
- Hurricane (clipper)
- Sir James Hutchison, 1st Baronet
- HMS Hydra (1871)
- HMS Hyperion (H97)
- Japanese submarine I-8
- Japanese submarine I-17
- Japanese submarine I-176
- I-351-class submarine
- SS I P Suhr
- SS Iberia (1954)
- Ibuki-class armored cruiser
- Ibuki-class cruiser
- Ice Boat No. 3
- Ictíneo II
- Ikazuchi-class destroyer
- SV Illeri
- SS Illinois (1873)
- MS Ilmatar
- HMS Imogen (D44)
- Imperator Aleksandr II-class battleship
- Russian ship of the line Imperator Nikolai I (1860)
- Russian battleship Imperator Pavel I
- Russian battleship Imperatritsa Ekaterina Velikaya
- Imperatritsa Mariya-class battleship
- Russian battleship Imperatritsa Mariya
- Imperial Eagle (ship)
- MV Imperial Transport
- HMS Imperieuse (1805)
- Italian battleship Impero
- HMS Implacable (R86)
- HMS Incomparable
- HMS Inconstant (1783)
- HMS Indefatigable (1909)
- Indefatigable-class battlecruiser
- Texan schooner Independence
- Independence (steamboat)
- MT Independența
- SS Indiana (1873)
- SS Indigirka
- HMS Indomitable (1907)
- Indomito-class destroyer
- SS Indus (1945)
- USRC Ingham (1832)
- Inishtrahull (1885)
- HMCS Integrity (1804)
- Intrepid Museum
- HM Armed Smack Inverlyon
- SS Invicta (1939)
- Invincible-class battlecruiser
- Russian battleship Ioann Zlatoust
- USS Iowa turret explosion
- SS Iowan
- SS Ira H. Owen
- SS Irish Pine (1919)
- SS Irish Willow (1917)
- SS Irma (1905)
- Iron Duke-class battleship
- SS Ironsides
- Isambard Kingdom Brunel Standing Before the Launching Chains of the Great Eastern
- Ise-class battleship
- Íslendingur
- Issaquah (steam ferry)
- HMS Ivanhoe (D16)
- MV Izumi
- Japanese cruiser Izumo
- USS J. Franklin Bell
- J.L. Thompson and Sons
- Jääkarhu
- Jacklyn (ship)
- SS Jacona (1918)
- Jadran (training ship)
- French destroyer Jaguar
- HMS Jamaica (44)
- SS James B. Stephens
- HMIS Jamnagar
- SS Jarvis Lord
- HMS Jason (1794)
- French battleship Jauréguiberry
- French battleship Jean Bart (1911)
- French ironclad Jeanne d'Arc
- USRC Jefferson Davis
- HMAS Jeparit
- John Ericsson-class monitor
- USS John Finn
- German trawler V 1302 John Mahn
- SS John Mitchell (1906)
- John Roach
- John Roach & Sons
- SS John V. Moran
- Jolly boat
- Joshua Hendy Iron Works
- MV Joyita
- HMS Junella
- French frigate Junon (1806)
- GSP Jupiter
- French battleship Justice
- Russian submarine Karelia (K-18)
- Soviet submarine K-43
- Soviet submarine K-222
- K-1000 battleship
- Kaba-class destroyer
- INS Kadmatt (P29)
- Soviet cruiser Kaganovich
- RV Kaharoa
- SMS Kaiser (1911)
- SMS Kaiser Franz Joseph I
- Kaiser Franz Joseph I-class cruiser
- Kaiser Friedrich III-class battleship
- Kaiser-class battleship
- SMS Kaiserin Augusta
- SMS Kaiserin
- Japanese frigate Kaiyō Maru
- Kalamazoo-class monitor
- MV Kalia
- Kaludah
- Japanese destroyer Kamikaze (1922)
- Kamikaze-class destroyer (1905)
- INS Kamorta (P28)
- Kanawha (1899)
- SS Kanguroo
- USRC Kankakee
- TSS Kanowna
- Kanuni (drillship)
- MV Karadeniz Powership Ayşegül Sultan
- MV Karadeniz Powership Zeynep Sultan
- Japanese munition ship Kashino
- Japanese corvette Kasuga
- Kawachi-class battleship
- Japanese battleship Kawachi
- Kawasaki Shipbuilding Corporation
- Kelvite sounding machine
- SS Kentuckian
- USRC Kewanee
- Keying (ship)
- PS Keystone State
- USS Kidd (DD-661)
- Kii-class battleship
- Kil-class sloop
- INS Kiltan (P30)
- HMS Kimberley (F50)
- King Philip (clipper)
- HMS Kingfisher (1770)
- Japanese battleship Kirishima
- HNoMS Kjell
- Klos C
- Russian ironclad Kniaz Pozharsky
- Russian battleship Knyaz Suvorov
- SS Kommandøren
- Končar-class missile boat
- Japanese ironclad Kongō
- Kongō-class ironclad
- Kongō-class battlecruiser
- SMS König Albert
- SMS König
- SMS König Wilhelm
- König-class battleship
- SS Königin Luise (1913)
- HNLMS Koning der Nederlanden
- HNLMS Koningin Regentes
- Russian ship of the line Konstantin
- MV Koolama (1937)
- SS Koombana
- SS Kościuszko
- Japanese torpedo boat Kotaka
- Japanese ironclad Kōtetsu
- SS Kowloon No.1
- USS Krishna
- Kronan (ship)
- SMS Kronprinz
- SS Kroonland
- Krupp armour
- Kulgoa
- INS Kulish (P63)
- Japanese cruiser Kuma
- MS Kungsholm (1952)
- SMS Kurfürst Friedrich Wilhelm
- INS Kursura (S20)
- FPSO Kwame Nkrumah
- LCM2000-class landing craft mechanised
- USS LST-266
- United States lightship LV-117
- French destroyer La Combattante
- La Dauphine
- French ironclad La Galissonnière
- La Galissonnière-class ironclad
- HMCS La Malbaie
- La Noumbi
- CCGS Labrador
- SS Lac La Belle
- Lady Hutton
- SS Lakeland
- HMS Landrail (1806)
- Landysh
- SS Lanthorn
- French submarine Laplace
- List of the largest ships hit by U-boats in World War I
- HMS Latona (1781)
- German weather ship Lauenburg
- HMS Laura (1806)
- Russian monitor Lava
- SS Lavia
- HMS Lavinia
- William Dawson Lawrence
- Le Griffon
- RV Le Suroît
- TS Leda
- HMS Ledbury (L90)
- Leeuwin (1621)
- HMS Legion (G74)
- USS Lejeune
- USS Leonard Wood
- SS Leonardo da Vinci (1958)
- Italian battleship Leonardo da Vinci
- SS Lesbian (1915)
- SS Lesbian (1923)
- Leschi (fireboat)
- SS Letitia
- USRC Levi Woodbury
- MV Levina 1
- USS Lewis B. Puller (ESB-3)
- MV Liemba
- Lifeboats of the Titanic
- Light Vessel 72
- HMS Lion (1910)
- Lion-class battlecruiser
- List of battleships of Germany
- List of bomb vessels of the Royal Navy
- List of fireships of the Royal Navy
- List of hospital ships sunk in World War I
- List of battlecruisers of Germany
- List of battlecruisers of Russia
- List of Empire ships (A)
- List of battlecruisers of Japan
- List of battlecruisers of the Royal Navy
- List of battleships of Austria-Hungary
- List of battleships of Spain
- List of destroyer classes of the Indian Navy
- List of destroyer classes of the United States Navy
- List of frigates of India
- Listing of historic ships in Sweden
- Sir James Lithgow, 1st Baronet
- HMS Little Belt (1807)
- Russian yacht Livadia (1880)
- HMS Lively (G40)
- Loch Line
- Loch Sloy
- Loch Vennachar
- London-class battleship
- Lone Tree Ferry
- HMS Lord Clive
- PS Lotta Bernard
- Lottie Sleigh
- Luxborough Galley
- USS Luzon (ARG-2)
- Lwów (ship)
- Lynchburg Ferry
- Lyon-class battleship
- Lytton (sternwheeler)
- MO-class small guard ship
- MT MOL FSRU Challenger
- TIV MPI Resolution
- MSC Sinfonia
- MT explosive motorboat
- MTB 345
- William K. MacCurdy
- McCawley-class attack transport
- Mackensen-class battlecruiser
- Madrid Express
- Mafuta (ship)
- RMS Magdalena (1948)
- HMS Magnanime (1748)
- SS Mahratta (1917)
- HMS Mahratta (G23)
- SS Makambo
- Malahat (schooner)
- Mallard II
- HMS Malta (1800)
- SS Manasoo
- SV Mandalay
- Mangalia shipyard
- SS Manhattan (1931)
- SS Mantola (1916)
- HMS Mantua
- Marc Guylaine
- USS Marcellus
- French ironclad Marengo
- SS Margaret Olwill
- MV Mariam
- SMS Marie
- Marie Séraphique
- Marine loading arm
- Marine steam engine
- Marine technology
- French submarine Mariotte
- SMS Markgraf
- HMS Marlborough (1912)
- French cruiser Marseillaise
- French cruiser Marseillaise (1935)
- HMS Martin (1910)
- Mary Rose
- Mary Rose Trust
- USRC Massachusetts
- French battleship Masséna
- Matchanu-class submarine
- Japanese destroyer Matsu (1944)
- Japanese ship Matsu
- SS Mauna Loa
- CSS Maurepas
- TS Maxim Gorkiy
- USAT McClellan
- USS McCawley (APA-4)
- Medea (yacht)
- HMS Mediator (1782)
- Egyptian frigate Mehemet Ali
- Melbourne–Voyager collision
- HMS Melpomene (1794)
- USS Meriwether
- HMS Mendip (L60)
- USS Menges
- SS Merchant
- Merchant Shipbuilding Corporation
- Merchant submarine
- SS Merion
- Messenger of Peace (missionary ship)
- Metamora (shipwreck)
- Meteor III
- Methane Pioneer
- Mexeflote
- INSV Mhadei (A76)
- MV Mi Amigo
- HMCS Midland
- HMS Milan (1805)
- French cruiser Milan
- SS Milazzo
- HMAS Mildura
- MV Millennial Spirit
- Millersburg Ferry
- Milwaukee-class monitor
- Brazilian battleship Minas Geraes
- Mincarlo (trawler)
- USS Mindanao (ARG-3)
- SS Minnesotan
- HMS Minotaur (1863)
- HMS Minotaur (1906)
- Minotaur-class cruiser (1906)
- Mirny (sloop-of-war)
- CSS Missouri
- 1950 USS Missouri grounding
- Miztec (schooner barge)
- HNoMS Mjølner (1868)
- HMS Modeste (1793)
- Soviet cruiser Molotov
- HMS Monarch (1747)
- SMS Monarch
- Monarch-class coastal defense ship
- HMS Monmouth (1796)
- Monohansett (steamboat)
- HMS Monsieur (1780)
- Montana-class battleship
- SS Montanan
- French ironclad Montcalm
- USNS Montford Point
- USS Monticello (AP-61)
- USS Montrose
- Moravian Church Mission Ships
- HMCS Morden
- ARA Moreno
- HMAS Moresby (1918)
- Morgan Iron Works
- Morning Star (1862 ship)
- French submarine Morse (1925)
- Morse Dry Dock and Repair Company
- Edward P. Morse
- Thomas Morton (shipwright)
- Moskva (1959 icebreaker)
- HM Motor Gun Boat 2007
- USS Mount Vernon (LSD-39)
- Moyie (sternwheeler)
- Muroc Maru
- Murtaja (1890 icebreaker)
- HMS Mutine (1797)
- SS Myron
- NMS Mărășești
- NMS Mărăști
- NV Ingenieurskantoor voor Scheepsbouw
- Nagato-class battleship
- Venezuelan patrol boat Naiguatá
- HMS Nairana (1917)
- Nairana-class escort carrier
- HMS Nairana (D05)
- Nancy (1775)
- Naniwa Maru
- Naniwa-class cruiser
- United States lightship Nantucket (LV-58)
- French ship Napoléon (1850)
- French submarine Narval (1925)
- SMS Nassau
- Nassau-class battleship
- Natchez (boat)
- USS Natrona
- Nautile
- List of ships named Nautilus
- Naval drifter
- Naval surgeon
- Naval wargaming
- Russian corvette Navarin
- Navis lusoria
- Russian ironclad Ne Tron Menia
- Neafie & Levy
- HMS Negro (1916)
- ERV Nene Hatun
- Neosho-class monitor
- HMS Neptune (1797)
- HMS Neptune (1874)
- French ship Neptune (1803)
- Spanish ship Neptuno (1795)
- Nero (yacht)
- USS New Mexico (BB-40)
- HMCS New Westminster
- New York (1836 steamboat)
- New York Central Tugboat 16
- HMS New Zealand (1911)
- Newburgh–Beacon Ferry
- USS Nicholson (DD-52)
- HMS Niemen (1809)
- HMS Niger (1892)
- HMS Nigeria (60)
- SS Nile (1850)
- HMS Nimble (1826)
- SMS Niobe (1849)
- Nobby (boat)
- USS Noble (APA-218)
- Nobska (steamship)
- SS Noemijulia
- MS Nordic Ferry
- SS Nordnorge (1923)
- SS Norhauk
- SS Norlom
- MV Norsel (1945)
- HMCS Norsyd
- North American Task Force
- Norwegian Getaway
- SMS Novara (1913)
- Novara-class cruiser
- Russian monitor Novgorod
- Number 13-class battleship
- Nunobiki Maru
- MV Nyon
- O'Byrne-class submarine
- O-class battlecruiser
- HMS Obdurate (1916)
- HMS Ocean (1863)
- French ironclad Océan
- SS Ocean Victory
- Odin-class coastal defense ship
- Odyssey (tanker)
- SS Ohio (1872)
- SS Ohio (1875)
- SS Ohioan (1914)
- USS Okaloosa
- USS Okanogan
- NOAAS Okeanos Explorer
- Japanese escort ship Okinawa
- USS Okinawa (LPH-3)
- SMS Oldenburg
- Italian auxiliary ship Olterra
- USS Omaha (CL-4)
- USS Oneida (APA-221)
- HMAS Onslow
- HMS Ontario (1780)
- Ontario (steamboat)
- Operation Ivory Soap
- Operation Sandblast
- German hospital ship Ophelia
- Russian cutter Opyt
- USS Orange County
- Convoy SC 7 order of battle
- HMS Orestes (1781)
- GSP Orizont
- USS Ormsby
- Ormsby-class attack transport
- SS Oropesa (1919)
- HMS Orpheus
- Russian frigate Oryol (1668)
- Russian ship of the line Oryol (1854)
- HSwMS Oscar II
- Russian battleship Oslyabya
- USCGC Ossipee
- SMS Ostfriesland
- SS Otsego
- Otter (1795 ship)
- Out of All the Masts
- SAS Outeniqua
- United States lightship Overfalls (LV-118)
- USCGC Owasco
- Owasco-class cutter
- HMS Owen Glendower (1808)
- Japanese cruiser Ōyodo
- USS Ozark (1863)
- HMS P36 (1941)
- HMS P48 (1942)
- HMS P222
- USS PC-496
- USS PC-1181
- USS PGM-17
- USS PGM-18
- MS Palatia (1928)
- SS Pan Kraft
- SS Panaman
- HMS Pandora (N42)
- Brazilian monitor Pará
- Pará-class destroyer (1908)
- Pará-class monitor
- SS Paris (1916)
- Park ship
- Oscar Parkes
- Parma (barque)
- Parramatta (1866)
- French cruiser Pascal
- SS Patria (1913)
- French battleship Patrie
- USRC Pawtuxet
- Pawtuxet-class cutter
- USS Paysandu
- HMS Pearl (1762)
- Peggy Stewart (ship)
- HMS Pembroke (M107)
- Pennsylvania-class steamship
- SS Pennsylvania (1872)
- SS Pennsylvanian
- Pensacola Convoy
- SS Pere Marquette 18
- SS Pere Marquette
- Russian battleship Peresvet
- Peresvet-class battleship
- French submarine Perle (1935)
- HMS Perseus (R51)
- HMS Perseverance (1781)
- Perseverance IV
- RMS Persia
- SS Persier (1918)
- HMS Peruvian (1808)
- Pervenets-class ironclad
- Russian ironclad Pervenets
- MT Petar Hektorović
- HMS Petard (G56)
- HMS Peterel (1794)
- Russian ironclad Petr Veliky
- SS Petriana
- Russian battleship Petropavlovsk (1911)
- Russian ironclad Petropavlovsk
- Petropavlovsk-class battleship
- SS Pfalz (1913)
- Phaethon (patrol boat)
- Philip and Son
- Phoenix (1973)
- HMS Phoenix (N96)
- Phoenix (fireboat)
- CSS Pickens
- Pierre Guillaumat (supertanker)
- MS Pieter Corneliszoon Hooft
- USS Pima County
- HMS Pique (1795)
- Italian cruiser Pisa
- Pisagua (ship)
- Pisces IV
- Pisces V
- NOAAS Pisces
- French submarine Plongeur
- HMS Plover (M26)
- French cruiser Pluton
- Pluton-class minelayer (1912)
- USS Pogy (SS-266)
- USCGC Point Caution
- USCGC Point Marone
- USCGC Point Young
- Pojama
- SS Polar Chief
- Polly (brig)
- Russian ship of the line Poltava (1712)
- Russian battleship Poltava (1894)
- HMS Polyanthus (K47)
- CSS Pontchartrain
- HMS Porcupine (G93)
- HMCS Port Arthur
- SS Port Nicholson (1918)
- Portland (1947 tugboat)
- SS Portmar (1919)
- SMS Posen
- Potosi (barque)
- Powership
- Prairial (supertanker)
- Pre-dreadnought battleship
- SS President Roosevelt (1921)
- SS President
- SMS Preussen (1903)
- HMS Prince Albert (1864)
- HMS Prince Charles (1941)
- HMS Prince William (1780)
- Prince of Wales (1786 ship)
- HMS Princess (1740)
- SS Princess Anne
- Hired armed cutter Princess Augusta
- HMS Princess Irene
- Princess Royal (1778 sloop)
- HMS Princess Royal (1911)
- SS Princess Sophia
- SS Principessa Jolanda (1907)
- HNLMS Prins Hendrik der Nederlanden
- SMS Prinz Adalbert (1901)
- SMS Prinz Eugen (1912)
- SS Prinz Friedrich Wilhelm
- SMS Prinz Heinrich
- SMS Prinzregent Luitpold
- Priscilla Dailey
- Priwall (barque)
- GSP Prometeu
- HMCS Protecteur (AOR 509)
- Providence (1866 steamboat)
- French frigate Psyché (1804)
- Pullmantur Cruises
- Purton Hulks
- Pushbacks by Greece
- HMS Pylades (1781)
- Q-Flex
- Q-Max
- HMS Quail (G45)
- Hired armed cutter Queen Charlotte
- HMS Queen Mary
- MV Queen of Oak Bay
- USS Queens
- USS R. B. Forbes
- R. J. Hackett (steamer)
- MV RMS Mulheim
- RMS Titanic Maritime Memorial Act
- RPS Rajah Soliman (D-66)
- RSS Panglima
- Rabboni (steam tug)
- Radetzky-class battleship
- USS Radnor
- SS Ragnhild (1941)
- SS Rajputana
- Ramped cargo lighter
- SS Ranpura
- HMS Raven II
- MS Ravnaas (1930)
- USS Rawlins
- Italian ironclad Re Umberto
- Reaney, Son & Archbold
- Reaper (sailing vessel)
- USS Recruit (1917)
- USS Recruit (TDE-1)
- Red Dragon (1595)
- Red, White and Blue (ship)
- French ironclad Redoutable
- HMS Redpole (1808)
- Leonard Redshaw
- MS Regatta
- NMS Regele Ferdinand
- NMS Regina Maria
- French submarine Regnault
- Reina Victoria Eugenia-class battleship
- French ironclad Reine Blanche
- French brig Renard (1810)
- Rescue of the Renown
- Renown-class battlecruiser
- USS Renville
- SS Republic (1871)
- French battleship République
- Reşadiye-class battleship
- HMS Resistance (1861)
- Russian ship of the line Retvizan (1855)
- French frigate Réunion (1786)
- HMS Revenge (1892)
- SS Revoljucija
- HMHS Rewa
- SMS Rheinland
- HMT Richard Bacon
- French ironclad Richelieu
- Richmond Shipyards
- HMS Rinaldo (1808)
- Brazilian monitor Rio Grande
- Brazilian ironclad Rio de Janeiro
- ARA Rivadavia
- Rivadavia-class battleship
- Robert C. Pringle (tug)
- Robert E. Lee (steamboat)
- SS Robert E. Peary
- USS Robert H. McCard
- RS RocketShip
- USS Rockwall
- HMS Roebuck (1774)
- HMS Roebuck (1743)
- Roller ship
- USS Romeo
- HMS Romney (1762)
- HMS Romulus (1785)
- Rosario-class sloop
- HMS Rose (1757)
- Russian cruiser Rossia
- Rottnest Island shipwrecks
- Rouse Simmons
- Rover (yacht)
- HMT Royal Edward
- Royal Naval Patrol Service
- MV Rubymar
- Rudyard Kipling (ship)
- Rum ration
- Russian monitor Rusalka
- SS Russia (1872)
- Russian floating nuclear power station
- ORP Rybitwa
- Ryou-Un Maru
- Japanese aircraft carrier Ryūhō
- SS Georgiana (1863)
- SS John Sherman
- SS Reina del Mar (1951)
- SS S.R. Kirby
- Sadko (submarine)
- HNoMS Sæl
- HMS Safari
- HMS Sainfoin (F183)
- HMS St Fiorenzo (1794)
- French battleship Saint Louis
- Greek battleship Salamis
- HMS Salisbury (1746)
- HMS Salsette (1805)
- MV Samho Jewelry
- Samuel P. Ely (shipwreck)
- Texan schooner San Antonio
- Texan schooner San Bernard
- San Esteban (1554 shipwreck)
- Italian cruiser San Giorgio
- Spanish ship San Ildefonso
- Texan schooner San Jacinto
- San Juan de Sicilia
- San Salvador (Guipúzcoan squadron)
- SS Sanct Svithun
- USS Sandpiper (AM-51)
- Sankaty
- Russian submarine Sankt Peterburg
- HMS Sans Pareil (1794)
- Brazilian monitor Santa Catharina
- Santa Claus (clipper)
- Santa Claus (steamboat)
- HMS Santa Dorothea (1798)
- SS Santa Kyriaki
- HMS Santa Margarita (1779)
- USS Santa Olivia
- SS Santa Paula (1916)
- São Gabriel (ship)
- São José Paquete Africa
- Brazilian battleship São Paulo
- HMS Saracen (P247)
- Sarah Dixon (sternwheeler)
- SS Sardinia (1888)
- Japanese minelayer Sarushima
- INS Satpura
- Japanese battleship Satsuma
- Savannah (steamboat)
- SC-21 (United States)
- USRC Scammel (1791)
- Scar boat burial
- Scarabeo 8
- Scarabeo 9
- HMS Sceptre (P215)
- SMS Scharnhorst
- Scharnhorst-class cruiser
- SS Schenectady
- Scorpion-class ironclad
- USS Scout (MCM-8)
- Sea Cloud
- Sea Serpent (clipper)
- HMS Seahorse (1748)
- USCGC Sebago (WHEC-42)
- STS Sedov
- Sefine Shipyard
- HMS Seine (1798)
- SS Selah Chamberlain
- USCGC Seneca (1908)
- HMS Seringapatam (1819)
- Spanish patrol boat Serviola
- Japanese battleship Settsu
- Russian battleship Sevastopol (1911)
- Russian battleship Sevastopol (1895)
- Russian ironclad Sevastopol
- Sevmash
- Sevmorput
- SMS Seydlitz
- SS Shalom
- HMS Shannon (1806)
- HMS Shannon (1906)
- Shearwater (schooner)
- MV Shelly
- USS Sheridan
- Shinan ship
- Ship's cat
- Ships lost in San Francisco
- Shirakumo-class destroyer
- Japanese aircraft carrier Shōhō
- MV Shōnan Maru 2
- Shoshone (Snake River sternwheeler)
- HMS Sickle
- Siegfried-class coastal defense ship
- SS Silesia (1869)
- HMS Simoom (P225)
- INS Sindhukirti (S61)
- MS Sinfra
- Sinking of the Spanish trawler Sonia
- Russian battleship Sinop
- SS Sir William Siemens
- Sir Winston Churchill (schooner)
- SS Sirio
- SS Sirius (1885)
- Skinner & Eddy
- HSwMS Sköld
- Skomvær (barque)
- Russian battleship Slava
- Russian monitor Smerch
- USCGC Smilax
- Isaac C. Smith
- Solway Harvester
- South American dreadnought race
- USRC South Carolina
- South Dakota-class battleship (1939)
- T. J. Southard
- Sovetsky Soyuz-class battleship
- Soviet guard ship Groza
- Sōya (PL107)
- Charles Spalding
- Clarence W. Spangenberger
- HMS Speedy (1782)
- Spence (tugboat)
- Sperrbrecher
- French corvette Sphinx (1829)
- MV Spiegelgracht
- MV Spirit of Norfolk
- HMS Spiteful (1899)
- HMS Spitfire (1782)
- HMS Splendid (P228)
- Splice the mainbrace
- HMS Sportsman
- Soviet destroyer Sposobny (1970)
- Spread Eagle (steamboat)
- USS Spuyten Duyvil
- Squib-class torpedo boat
- HTMS Sri Ayudhya
- HMCS St. Thomas
- Stabilimento Tecnico Triestino
- Stadt Zürich (ship, 1855)
- SS Stalingrad
- Stalingrad-class battlecruiser
- HMAS Stalwart (D 215)
- MV Star of Malta
- State of Pennsylvania (steamboat)
- Staten Island boat graveyard
- Steam tug Brent
- Steamboats of the upper Columbia and Kootenay Rivers
- HSC Stena Voyager
- USS Stewart (DE-238)
- MS Stockholm (1941)
- MS Stolt Surf
- MT Stolt Valor
- HMS Stonehenge (P232)
- MF Storegut
- HMS Stork (1756)
- HMS Storm
- HNoMS Storm (1898)
- HMS Stratagem
- RMS Strathmore
- Streamlined Ocean Liner
- List of Sturgeon-class submarines
- Submarine incident off Kildin Island
- SS Suevic
- French battleship Suffren
- French ironclad Suffren
- French cruiser Sully
- HMS Sultan (1775)
- Ottoman torpedo boat Sultanhisar
- Sumter-class attack transport
- Sundowner (yacht)
- Sunny South (clipper)
- Super Dvora Mk III-class patrol boat
- HMS Superb (1710)
- USS Supply (1872)
- HMS Surly (1806)
- HMS Surly (1855)
- HMS Surly (1856)
- USRC Surveyor
- Suur Tõll (icebreaker)
- HMS Swallow (1745)
- Swedish American Line
- HMS Swiftsure (1787)
- HMS Swordfish (1916)
- HMAS Sydney (R17)
- Sylph (1831 ship)
- RMS Sylvania
- HMS Syrtis
- German torpedo boat T22
- German torpedo boat T23
- German torpedo boat T24
- INS Tabar
- SS Takliwa
- Brazilian ironclad Tamandaré
- SS Tararua
- INSV Tarini
- Tarmo (1907 icebreaker)
- HMS Tartar (F43)
- HMS Tartar's Prize
- PS Tashmoo
- USS Tazewell
- HMNZS Te Mana (F111)
- Operation Teardrop
- SMS Tegetthoff (1912)
- Tejuca
- Telegraph (1914 sternwheeler)
- HMS Telemachus (P321)
- SS Tembien
- HMS Temeraire (1798)
- HMS Terpsichore (1785)
- HMS Terror (I03)
- Terukuni Maru (1929)
- Japanese destroyer Teruzuki (1941)
- Texel Disaster
- SS Thames
- HMS Thanet (H29)
- TSS The Queen
- SS Theresia L M Russ
- French ironclad Thétis
- Thomas Powell (steamboat)
- Thomas Wilson (shipwreck)
- Thoon Kramom (1866 ship)
- HNoMS Thorodd
- USS Threat
- SMS Thüringen
- SS Thuringia (1922)
- USS Timbalier
- SS Timothy Bloodworth
- Tirpitz (pig)
- Titanic International Society
- MY Titanic
- Titanic Memorial, Belfast
- Titanic in popular culture
- SS Tobruk
- Tokio Express
- Tonan Maru No. 3
- HNoMS Tor (1939)
- Torpedo...Los!
- SS Torrington
- Tosa-class battleship
- Japanese battleship Tosa
- Tower Belle
- Trabajador (1931)
- HMCS Trail
- MV Maria Reina
- MV Transpacific (T-1)
- Russian battleship Tri Sviatitelia
- HMS Trial (1744)
- French ironclad Triomphante
- Triple E-class container ship
- Troy (submarine)
- Trunk deck ship
- Tryall
- Trygg-class torpedo boat
- Russian ship of the line Tsesarevich (1857)
- SS Tubantia
- Tuff-E-Nuff (tugboat)
- Russian submarine Tula (K-114)
- Matthew Turner (shipbuilder)
- Turret deck ship
- Turuma
- HMS Tyger
- SS Tyndareus
- HMS Tynedale (L96)
- Type IXA submarine
- Type IXB submarine
- Type 1936B destroyer
- Type UE II submarine
- SM U-4 (Austria-Hungary)
- U-5-class submarine
- U-10-class submarine
- SM U-10 (Austria-Hungary)
- SM U-11 (Austria-Hungary)
- SM U-16 (Austria-Hungary)
- SM U-21 (Germany)
- U-27-class submarine (Austria-Hungary)
- German submarine U-27 (1936)
- German submarine U-30 (1936)
- German submarine U-39 (1938)
- German submarine U-42 (1939)
- German submarine U-43 (1939)
- German submarine U-44 (1939)
- U-48-class submarine
- U-50-class submarine
- U-52-class submarine
- German submarine U-64 (1939)
- German submarine U-78 (1940)
- German submarine U-81 (1941)
- German submarine U-94 (1940)
- U-101-class submarine
- German submarine U-104 (1940)
- German submarine U-106
- German submarine U-106 (1940)
- U-107-class submarine
- German submarine U-109 (1940)
- German submarine U-111 (1940)
- German submarine U-117 (1941)
- SM U-118
- German submarine U-162 (1941)
- German submarine U-241
- German submarine U-246
- German submarine U-255
- German submarine U-256
- German submarine U-343
- German submarine U-355
- German submarine U-371
- German submarine U-376
- German submarine U-450
- German submarine U-515
- German submarine U-558
- German submarine U-564
- German submarine U-607
- German submarine U-656
- German submarine U-710
- German submarine U-771
- German submarine U-777
- German submarine U-804
- German submarine U-1018
- German submarine U-1022
- German submarine U-1065
- German submarine U-1163
- German submarine U-2336
- SM UB-10
- SM UB-42
- SM UB-47
- USNS Lewis B. Puller (ESB-1)
- USS Hermitage (AP-54)
- USS Wakefield (AP-21)
- SM UB-2
- SM UB-3
- SM UB-4
- SM UB-6
- SM UB-8
- SM UB-12
- SM UB-13
- SM UB-14
- SM UB-16
- SM UB-43
- SM UB-44
- SM UB-45
- SM UB-46
- SM UB-50
- Udema
- SS Uhenfels
- Ultra Fast Attack Craft
- Umikaze-class destroyer
- SS Umona
- Una-class submarine
- Unadilla-class gunboat
- Uncompleted U-boat projects
- Underfall Yard
- MT Unirea
- United States Senate inquiry into the sinking of the Titanic
- Uragan-class monitor
- Urakaze-class destroyer
- ARA Uruguay
- SS Ussukuma
- SS Utopia
- Valemax
- SS Valencia
- HMS Valiant (1863)
- Vallejo (ferry)
- USS Van Buren (1839)
- HMCS Vancouver (K240)
- HMS Vandal
- Vandal (tanker)
- USS Varuna (1861)
- Soviet cruiser Vasily Chapayev
- Venetian Arsenal
- Venetian arsenal, Gouvia
- HMS Vengeance (1800)
- HMS Vengeance (R71)
- SS Ventnor
- Russian submarine Verkhoturye (K-51)
- SS Vernon
- HMS Versatile (D32)
- SS Vestris
- Italian cruiser Vettor Pisani
- HMVS Victoria (1855)
- French ironclad Victorieuse
- HMS Vidal
- HMAS Vigilant
- USRC Vigilant (1791)
- SS Vigrid
- INS Vikrant (1961)
- HMCS Ville de Quebec (K242)
- SS Ville du Havre
- HMS Vindex (D15)
- HMS Vindex (1915)
- HMS Vindictive (1918)
- USRC Virginia (1791)
- MV Virginian
- HSwMS Visby (K31)
- Voima (1952 icebreaker)
- HMS Volage (1869)
- MS Volendam
- Soviet cruiser Voroshilov
- Vorpostenboot
- Vostok (sloop-of-war)
- Wa (watercraft)
- USS Wabash (1855)
- Japanese seaplane carrier Wakamiya
- French cruiser Waldeck-Rousseau
- Walk-in-the-Water (steamboat)
- Walsh-Kaiser Company
- HMS Wanderer (D74)
- USS Warren (APA-53)
- RIMS Warren Hastings
- Warrior-class ironclad
- Warrior-class cruiser
- Warrior (steamboat)
- USS Washington (BB-47)
- PS Washington Irving
- SS Washingtonian (1913)
- Waveney-class lifeboat
- USRC Wayanda
- USS Wayne
- Weather buoy
- Weather ship
- William H. Webb
- SMS Weissenburg
- USS West Alsek
- SS West Cheswald
- SS West Cressey
- USS West Ekonk
- SS West Elcajon
- USS West Elcasco
- SS West Eldara
- SS West Gotomska
- MS West Grama
- USS West Haven
- USS West Hobomac
- MS West Honaker
- SS West Hosokie
- SS West Humhaw
- SS West Lashaway
- USS West Lianga
- West Loch disaster
- SS West Loquassuck
- SS West Mahomet
- SS West Maximus
- SS West Nohno
- West Ridge (ship)
- West Street Foundry
- SS Western Front
- Western Local Escort Force
- Western Pipe and Steel Company
- Jacob Aaron Westervelt
- SMS Westfalen
- MV Westward
- Whaling disaster of 1871
- HMS Whiting (1805)
- HMS Whiting (1812)
- Wicher-class destroyer
- SMS Wien
- Finnish transport vessel Wilhelm Carpelan
- HMS Wilhelmina (1798)
- William C Daldy
- USS William P. Biddle
- William P. Frye (1901)
- Henry Wimshurst
- Windermere (submarine)
- Windsor-class attack transport
- USCGC Winnebago
- Wittelsbach-class battleship
- Wolfe-class ship of the line
- Gustav Wilhelm Wolff
- HMS Wolverine (1805)
- Wolverine (motor vessel)
- List of longest wooden ships
- USCGC Woodrush
- HMCS Woodstock
- SMS Wörth
- MV Wotan
- Wreck of the Titanic
- Wyvern (vessel)
- French submarine X
- Japanese cruiser Yakumo
- Japanese battleship Yamashiro
- Yampa (yacht)
- Chinese corvette Yangwu
- Yankee (ferry)
- SS Yarmouth
- MV York
- Yuan Wang-class tracking ship
- German destroyer Z2 Georg Thiele
- German destroyer Z3 Max Schultz
- German destroyer Z4 Richard Beitzen
- German destroyer Z8 Bruno Heinemann
- German destroyer Z9 Wolfgang Zenker
- German destroyer Z11 Bernd von Arnim
- German destroyer Z12 Erich Giese
- German destroyer Z13 Erich Koellner
- German destroyer Z16 Friedrich Eckoldt
- French submarine Z
- Soviet frigate Zadornyy
- Texan schooner Zavala
- SS Zealandic (1911)
- HMS Zenobia (1807)
- USNS Zeus
- Zidell Companies
- Yugoslav minelayer Zmaj
- HMS Zubian
- Zuihō-class aircraft carrier