surface sonar
71Acoustic torpedo — An acoustic torpedo is a torpedo that aims itself by listening for characteristic sounds of its target or by searching for it using sonar. Acoustic torpedoes are usually designed for medium range use, and often fired from a submarine.The first… …
72commercial fishing — Introduction the taking of fish and other seafood and resources from oceans, rivers, and lakes for the purpose of marketing them. Fishing is one of the oldest employments of humankind. Ancient heaps of discarded mollusk shells (shell… …
73Upholder/Victoria class submarine — The Upholder / Victoria class submarines, also known as the Type 2400 (due to their displacement of 2,400t), are diesel electric Fleet submarines designed in the UK in the late 1970s to supplement the Royal Navy s nuclear submarine force. In 1998 …
74Oberon class submarine — For the 1920s O class submarines, sometimes referred to as the Oberon class, see Odin class submarine. HMS Otus Class overview Name: Oberon …
75Type 039 submarine — The Type 039 submarine (NATO code name Song class) is a class of diesel electric submarines of the People s Liberation Army Navy. The class is the first to be fully developed within China and also the first Chinese submarine to use the modern… …
76Depth charge — For other uses, see Depth charge (disambiguation). Mark IX Depth Charge used by the U.S. Navy late in World War II. Unlike the cylindrical, barrel shaped depth charge used earlier, the Mark IX is streamlined and equipped with canted fins to… …
77Cetacea — Cétacés Cétacés …
78Type 45 (Clase Daring) — El HMS Daring saliendo de la Base Naval de Portsmouth País productor …
79Underwater archaeology — is the study of past human life, behaviours and cultures using the physical remains found in salt or fresh water or buried beneath water logged sedimentMuckelroy, K., Maritime archaeology. Cambridge University Press 1978. ISBN 0 521 29348 0] . It …
80Beached whale — A beached whale is a whale which has become stranded on land, usually on a beach. Beaching is often fatal for whales, as they become dehydrated and die. Some die when their lungs are suffocated under their own weight or drown when high tides… …
