The Submarines

HistoryJay leeBrian

The submarineSubmarines are ships that can operate

both under and on top of the water.One of the first submersible vessels was

built around 1620 by a Dutchman named Cornelius van Drebbel.

Submarines have changed a lot since Drebbel's day. Today some submarines are 200 metres long and carry a crew of over 150. Nuclear powered submarines can stay underwater for months at a time.

Submarines of WW1Technical developments from 1914 to 1918

greatly boosted the submarine as a weapon and as World War One developed.

German Deutschland class of merchant U-boats, each 315 feet long with two large cargo compartments. U-boats could carry 700 tons of cargo at 12- to 13-knot speeds on the surface and at seven knots submerged.Now the submarine called Kotor. This submarine was made by German.

The U-155The U-155 when fitted with torpedo tubes

and deck guns, and, with seven similar submarines, it served in a combat role during the latter stages of the war.

The U-155 was "standard" submarine of World War I measured slightly over 200 feet in length and displaced less than 1,000 tons on the surface.

Submarine USS 0 7USS O-7, a 521-ton O-1 class submarine

built at Quincy, Massachusetts, was commissioned in July 1918.

When the 11 November 1918 Armistice brought the First World War's fighting to an end, O-7 returned

Also The submarine is using in World War 2.

The HAMS AE2HMAS AE2 (originally known as AE2) was an

E-class submarine of the Royal Australian Navy.

The AE2 is measured slightly over 181 feet in length and displaced less than 800 tons on the surface.

the submarine’s speed was 15 knots(surfaced), 10knots(submerged).