Hi, everyone!
No.517 Squadron was a meteorological squadron, forming as part of Coastal Command from No.1404 (Met) Flight in August 1943. A shortage of Halifaxes meant that the squadron was initially equipped with Hampdens and Hudsons, and even had to borrow four B-17F Flying Fortresses from the 379th Squadron, USAAF, to fill a gap between the end of Hudson and Hampden operations and the arrival of the Halifax. The squadron's main duty was to carry out meteorological flights over the western approaches, to help forecast the weather.
After the arrival of the Halifax in November 1943, the squadron moved to Pembroke shire, continuing to carry out weather flights while also performing anti-submarine patrol duties.
https://drive.google.com/open?id=1DdMeWOjbyzxsLjuLLtsh013kn53Jgp_E