There are 2 primary reasons:
1. Pressure in the boat helps to seal hull valves and other mechanical equipment that rely on seals to keep water out of the boat.
2. Monitoring the air pressure in the boat is a primary way to discover leaks or flooding; if there is a drop in pressure for no apparent reason, it's a good bet that water is coming in from somewhere.
pressure..!
1. Ballistic submarines 2. Attack submarines
Yes, North Korea has submarines
Submarines - poem - was created in 1917.
One of our Submarines was created in 1982.
Dallas Submarines was created in 1920.
Boats, Subs, Submarines, Home.
yes
Argentina had diesel-electric submarines while the British had nuclear-powered submarines.
Using oxygen or compressed air to pressurize appliances can be dangerous because they are highly flammable and may lead to explosions or fires if they come into contact with a spark. It is safer to use inert gases like nitrogen to pressurize appliances for leak checking to prevent any potential hazards.
All submarines can sink. Some can return to the surface.
submarines dont sail idiot