Torpedo bulkhead

Imagine you're on a boat and a scary submarine is coming towards you trying to hit your boat with a big missile. A torpedo bulkhead is like a really strong wall in the bottom of the boat that helps protect you from the missile. It's made of thick metal and is designed to stop water from coming in if the boat gets hit by a torpedo. It's like a superhero shield that keeps the bad guys from hurting you and makes sure your boat stays safe!