National Geographic starts a programme from tonight 14 December at 9 pm called 60th Anniversary of Pearl Harbour.

Tonight's episode is called Sea Power. It examines the development of the ship from the first wooden sailing aship to nuclear submarines that make no sound while moving. Submarines are important at a time of war and conflict when defending the water area from enemy attacks.

Gun battleships and aircraft carriers have also played crucial roles in both the world wars. In the episode viewers will come on board an American Navy cruiser and learn how today's most feared warships evolved.

The next episode on 21 December is called Submarine. It scrutinises this unique vessel right from its simple beginnings as a small clam shaped vessel to major weapon of destruction. In the beginning the concept of an attack vessel which could attack from deep benath the waves was simply a distant dream. Now that dream has been fulfilled.

The 28 December episode deals with Big Guns. The gun battleship has become one of the greatest symbols of military firepower. Battleships started dominating the sea by 1943. They bombed targets on the coast with a devastating accuracy. This episode uses archival footage and historicaly accurate reenactnments.

The Monitor is the most famous and it was originally designed as a simple gun platform. The USS bunker Hill will also be examined. This is a Ticonderoga class fast cruiser with America's Pacific Fleet.