The list of ship commissionings in 1973 includes a chronological list of all ships commissioned in 1973.
| Operator | Ship | Class and type | Pennant | Other notes | |
|---|---|---|---|---|---|
| 13 March |  Finland, Finnlines
|
Finnpartner | Ferry | Formerly Stena Atlantica with Stena Line | |
| 17 June | Finland, Rederi Ab Sally
|
Viking 4 | Ferry | For Viking Line traffic | |
| 30 June | Finland, SF Line
|
Aurella | Ferry | For Viking Line traffic | |
| 15 September |  Soviet Union
|
Marshal Voroshilov | Project 1134A Berkut A large anti-submarine ship | ||
| 28 December | Soviet Union
|
Admiral Oktyabrsky | Project 1134A Berkut A large anti-submarine ship |