A submarine is a vessel that is capable of propelling itself underwater as well as at the surface of water. U-boats are submarines of Germany which were designed to be used in world wars I and II

A ship is a large vessel which floats on water. It has a huge capacity to carry cargo or passengers than ordinary boats. Submarine is a specialized watercraft which propels beneath the water as well as on the...

The seaman is the lowest rung in the deck department. It is an entry-level position that does not require any experience as all. The duties of a seaman include doing anything and everything that is required...