S42
S42 stands for:
- S-Bahn line 42 (Berlin)
- HMS Ursula (S42) , a Victoria-class conventional long-range hunter submarine of the Royal Navy of Great Britain
S-42 stands for:
- Sikorsky S-42 , was a flying boat from the Sikorsky Aircraft Corporation
- USS S-42 (SS-153) , an American submarine
