Vessels

__Vessels__

A vessel is a ship designed and equipped to carry out developmental research at sea. Most vessels are built to sustain in polar waters. All vessels, however, are built for different purposes according to the tasks they must perform.

The first type of vessel is a hydrographic vessel. These vessels retrieve hydrographic research and survey. Hydrographic survey means the measurement of features that may affect maritime navigation, marine construction, or the such. They collect seismic survey of the seabed and underlying geology, locate geological features that could contain gas or oil, and produce charts.

Another type of vessel is the oceanographic vessel. They are built to retrieve information on physical, chemical and biological characteristics of water, atmosphere and climate. They also carry equipment for hydrographic seabed sounding and collect water samples.

There is also the fishery vessel. These vessels are built with platforms that can tow different fishing nets. They can collect plankton and water samples, and carry acoustic fish-finding equipment. These vessels are important to the seafood industry.Naval research vessels are important to the military. They are built to investigate naval concerns. Some of these concerns include nearby enemy submarines, mine detection, sonar and weapon trailing. Sonar uses sound to detect nearby vessels or equipment.

Another vessel is the polar research vessel. They are built around an icebreaker hull. An icebreaker hull helps the vessel to break through solid ice in arctic conditions. This allows them to operate in polar waters. Almost all of their work is done in the Antarctic. Some of the research involves polar replenishment and supplying vessels to the Antarctic research base.

Finally, there are submarines. Submarines are watercraft that can operate underwater for a span of a few hours to six months depending on the vessel and how it is built. Submarines are used for many things. They can be used to attack enemy's ships or run blockades in the navy. They can also be used for marine science, environmental salvaging, exploration, and facility inspection or maintenance.