1 The submarine submerged to avoid enemy ships.
2 The submarine returned to its home base in Vancouver.
3 All employees at the submarine base require security clearance.
4 A spokesman for the dockyard said they hoped to launch the first submarine within two years.
5 The President has agreed to allocate further funds to develop the new submarine.
6 The submarine is driven by nuclear power.
7 He detected a ship moving down the starboard side of the submarine.
8 I was instructed to inquire from the German Government as to whether a German submarine had sunk the Sussex.
9 Without British help it's clear the Russian submarine would have perished at the bottom of the Pacific Ocean.
10 Divers trying to raise the bodies of 118 sailors from the sunken Kursk nuclear submarine were near to finishing a man-sized hole in the hull on Tuesday.
11 Prickly Sharks are found mostly in submarine canyons and its numbers are being depleted due to overfishing.