List of ship commissionings in 1939
The list of ship commissionings in 1939 includes a chronological list of ships commissioned in 1939. In cases where no official commissioning ceremony was held, the date of service entry may be used instead.
| Date | Operator | Ship | Class and type | Notes | Ref |
| 2 February | ' | ||||
| 4 February | ' | ||||
| 4 February | ' | ||||
| 11 February | ' | ||||
| 4 March | ' | ||||
| 16 April | ' | ||||
| 22 April | ' | ||||
| 22 April | ' | ||||
| 29 April | ' | ||||
| 30 April | ' | submarine | ex-Batiray seized from the Turkish Navy during construction | ||
| 24 June | ' | ||||
| 3 July | ' | ||||
| 15 July | ' | ||||
| 22 July | ' | ||||
| 1 August | ' | ||||
| 12 August | ' | ||||
| 26 August | ' | ||||
| 28 August | ' | ||||
| 5 August | light seaplane carrier | ||||
| 20 September | ' | ||||
| 23 September | ' | ||||
| 30 September | ' | recommissioned to establish the Neutrality Patrol | |||
| September | ' | Vorpostenboot | converted fishing trawler | ||
| 2 October | ' | hospital ship | converted ferry, ex-Dinard of the Southern Railway Co | ||
| 12 October | ' | seaplane tender | converted merchant ship | ||
| 4 November | ' | ||||
| 4 December | ' | recommissioned from reserve at Philadelphia Navy Yard for Neutrality Patrol | |||
| 12 December | ' | ||||
| 16 December | ' | ||||
| 21 December | ' | ||||
| unknown date | ' | seaplane tender | civilian type |