It is based at PNS Mehran and operates Westland Sea King helicopters deployed aboard various ships of the Pakistan Navy.

45/45A helicopters as part of modernization project for the navy which resulted in the 111 ASW Squadron being established.

These Sea kings were capable of Anti-submarine & Anti-surface warfare which could fire AM-39 Exocet anti-ship missiles, Mk.

[4][5] Other than its primary wartime role, the squadron is also assigned secondary duties such as SAR, MEDEVAC, HVBSS, Para Drop and VVIP/Passenger transport.

It has conducted several recue operations during the 2005 Kashmir earthquake and 2010 floods.