system
Given the following post, respond as if you're commenting on Reddit:
human
Eli5: How are submarine deck guns able to still be fired after being submerged in salt water?
gpt
They're heavily protected by anti-corrosive paint on the outside, slathered in waterproof grease, and they only submerged with the breech closed and the muzzle plugged. That way, saltwater never got into the inner workings of the gun.