2007-10-14 08:41:47 · 15 answers · asked by steve p 1 in Cars & Transportation ➔ Boats & Boating
It's a simple matter of bouyancy. If the submarine needs to dive, sea water is allowed into her ballast tanks. These fill to a point where she has negative bouyancy, and thus dives.
When she needs to surface, compressed air is used to expell the water, giving her positive bouyancy, and hence she returns to the surface.
When submerged, dive planes (they look like small wings on the hull and conning tower of the submarine) are used to change depth. The submarine flies through the water in a similar manner to an aeroplane flying through the air.
2007-10-14 10:26:05 · answer #1 · answered by The Tenth Duke of Chalfont 4 · 2⤊ 0⤋
All submarines have big tanks that they fill with sea water to make the sub heavier and therefore submerge.
When they want to surface they force the water out and replace it with air which makes the sub lighter.
Its all about balancing 10000tons of metal.
2007-10-17 10:16:56 · answer #2 · answered by futuretopgun101 5 · 0⤊ 0⤋
Submarines are made buoyant and add water to submerge, and to surface, air is pumped into the tanks to expell the air.
2007-10-15 13:35:12 · answer #3 · answered by Anonymous · 0⤊ 0⤋
They will fill the ballast tanks with sea water if they want to dive.
When they want to go up to the surface they will use compressed air to empy the ballast tanks and this way they will get positive buoyancy and they will go up.
2007-10-14 18:07:44 · answer #4 · answered by RR 2 · 2⤊ 0⤋
By attaching empty Javex bottles to the front & back tips .
2007-10-16 17:05:10 · answer #5 · answered by Andre g 2 · 0⤊ 0⤋
Magic!
2007-10-15 21:46:16 · answer #6 · answered by Roy W 1 · 0⤊ 0⤋
Air tanks Pull water in down she goes>Compressed air purges the water out up she goes>
2007-10-14 15:46:43 · answer #7 · answered by 45 auto 7 · 0⤊ 2⤋
The same way the other boats do.
When they want to go above or below the sea level, they pump water out to go above and vice-versa to go down
2007-10-14 16:01:31 · answer #8 · answered by The Rugby Player 7 · 0⤊ 2⤋
Buoyancy and ballast
2007-10-15 16:14:18 · answer #9 · answered by Gary Williams 2 · 0⤊ 0⤋
Archimedes principal explains how boats float.
2007-10-14 21:17:47 · answer #10 · answered by landfall43 4 · 1⤊ 1⤋