Quick snapshot while doing other stuff.
update 14/4/2022 I think my bore estimation at a distance skills are still top notch. It’s a party trick that annoys my wife. Show me a gun, I say, I’ll estimate bore and caliber. ( you can say all kinds of rubbish in a blog) . Anyway I just finally identified the gun.
The 40mm NC 1 L 60 Gun Weapon System (GWS) has been in the naval inventory since 1943.
The Canadian Forces removed the guns from their surface fleet in the late 1980s when they were considered to be outdated, only to re-use old Bofors guns as the main armament of the Kingston-class coastal defence vessel. The Bofors served as the main armament for almost 20 years.The decision to remove them was made in 2014, due to their maintenance burden, and their lack of stabilization.
Addendum June 5 2022.
Martins comment prompted me to post this pic of nearby equipment.