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2. Light tower (equipment) - Wikipedia

   en.wikipedia.org/wiki/Light_tower_(equipment)

   A light tower is a piece of mobile equipment which has one or more high-intensity electric lamps and a mast. Almost always, the lights are attached to the mast, which is attached to a trailer, with a generator set to power the lamps. Normally the lamps are metal halide bulbs and the generator is powered

3. Harbor 20 - Wikipedia

   en.wikipedia.org/wiki/Harbor_20

   The boat has a draft of 3.50 ft (1.07 m) with the standard keel installed. [1] [2] Harbor 20 showing the angled transom and Hoyt jib boom. The boat may be fitted with an optional factory-supplied 24-volt electric motor for docking and maneuvering, that is stowed on a retractable stainless steel pivot arm in the stern lazarette. The motor is ...

4. V20 engine - Wikipedia

   en.wikipedia.org/wiki/V20_engine

   Mercedes-Benz MB 511 marine diesel engine. Beginning in the late-1930s, Mercedes-Benz produced several large V20 diesel engines for use in marine applications. The first engine was the MB 501 which was based on the MB 500 V12 engine and was installed in the 1937 class Schnellboot (fast attack boat) and several submarines.

5. Type XXI submarine - Wikipedia

   en.wikipedia.org/wiki/Type_XXI_submarine

   It also provided a sprint ability when positioning itself for an attack. Older boats had to surface to sprint into position. This often revealed a boat's location, especially after aircraft became available for convoy escort. The Type XXI was also equipped with a pair of electric "creep motors" for silent running. [11]

6. Harbor Boat Building Company - Wikipedia

   en.wikipedia.org/wiki/Harbor_Boat_Building_Company

   Harbor Boat Building Company built Adjutant-class minesweepers, an auxiliary motor minesweepers for the United States Navy and other counties in the 1950s. The Adjutant class had a displacement of 330 long tons (340 t) light, 390 long tons (400 t) full load, a length of 138 ft (42 m), a beam of 27 ft (8.2 m) and a draft of 9 ft (2.7 m).

7. Remotely operated underwater vehicle - Wikipedia

   en.wikipedia.org/wiki/Remotely_operated...

   ROV at work in an underwater oil and gas field. The ROV is using a torque wrench to adjust a valve on a subsea structure.. A remotely operated underwater vehicle (ROUV) [citation needed] or remotely operated vehicle (ROV) is a free-swimming submersible craft used to perform underwater observation, inspection and physical tasks such as valve operations, hydraulic functions and other general ...