When people think of Naval Operations in WWII, it is usually in the South Pacific.

Things were a "bit different" in the Northern Atlantic as shown in this article by Bill Crawford

“De-Icing Topside Equipment”

During our anti-submarine patrols in the North Atlantic Ocean, A sheet of ice would build up topside from the drizzle, rain, and spray and the very low outside weather temperatures as we searched for German U-boats on the Convoy routes.

In order to fire the ready guns and use the depth charges, this coating of ice had to be removed or you could not fire the guns or drop charges. 

All Crew Members at one time or another were required to help in de-icing the equipment.  The ready gun crews and lookouts really had a rough time in this area standing their watches.

We were at “GQ” for long periods of time.  Having a hot cup of “JOE” (coffee) really hit the spot.  Sometimes we were at general quarters so long the cooks would try to get some food out to the crew.  This was not much of a success with the weather conditions and trying to stay warm and dry in a freezing rain and Ice forming on everything top side, including the crew.