A barge is a flat-bottomed ship, built mainly for river and canal transport of heavy goods. Some barges are not self-propelled and must be towed or pushed by towboats, canal barges or towed by draft animals on an adjacent towpath. Barges contended with the railway in the early Industrial Revolution, but were outcompeted in the carriage of high-value items due to the higher speed, falling costs and route flexibility of railways.[from wikipedia]

When boats are hauled from the water to be repaired, their keel is set on short blocks and the hull is held by long woodenblocks.

A coast guard or coastguard is a maritime security organization of a particular country. The term embraces wide range of responsibilities in different countries, from being a heavily armed military force with customs and security duties to being a volunteer organization tasked with search and rescue without law enforcement authority. A typical coast guard's functions are distinct from those of the navy (a military service) and the transit police (a law enforcement agency).[from wikipedia]

A small boat carried or towed by a larger vessel

A fireboat is a specialized watercraft with pumps and nozzles designed for fighting shoreline and shipboard fires. The first fireboats, dating to the late 18th century, were tugboats, retrofitted with firefighting equipment. Older designs derived from tugboats and modern fireboats more closely resembling seafaring ships can both be found in service today. Some departments would give their multi-purpose craft the title of "fireboat" also.[from wikipedia]

Water craft utilized for the purpose of catching fish.

Paddle or peddle powered water craft

A navigation light, also known as a running or position light, is a source of illumination on a vessel, aircraft or spacecraft. Navigation lights give information on a craft's position, heading, and status. Their placement is mandated by international conventions or civil authorities. [from wikipedia]

Boats that are replicas of actual boats, sometimes located in a scene.

Boats that are propelled by us of a cylinder rotated at the rear of the craft.

Boats that carry pilots out to ships. This is so that the pilot canhelp guide the ship into a tricky to reach pier, or past breakwaters orsunken cables, or past other hazards.

Motor and Engine powered water craft

A small boat used for touring or tourist reasons.Tour boats typically travel for a short period of less than a day.Contrasts tour boats with with cruise ships that travel for many days with accommodation in cabins.

Shipwrecks are abandoned worldwide.A old boat that has come upon bad times loses its sea worthyness.