41-foot Utility Boat, Large
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The USCG Utility Boat, or UTB, was a standard utility
boat A boat is a watercraft of a large range of types and sizes, but generally smaller than a ship, which is distinguished by its larger size, shape, cargo or passenger capacity, or its ability to carry boats. Small boats are typically found on inl ...
used by the
United States Coast Guard The United States Coast Guard (USCG) is the maritime security, search and rescue, and law enforcement service branch of the United States Armed Forces and one of the country's eight uniformed services. The service is a maritime, military, mult ...
for a variety of inshore and offshore missions.


General information

The 41 ft (12 m) UTB was designed to operate under moderate weather and sea conditions where its speed and maneuverability made it an ideal platform; however, due to the modified "V" design when the 41ft UTB when operated in a following seaway it had a tendency to be pushed to the starboard or port making it difficult when entering an entrance. Overall, the 41ft UTB was a vast improvement over the previous 40ft UTB's as the previous UTB's offered little to no protection from the sun, sea and wind conditions for the crew. The boats were welded 5086 aluminum, with a molded fiberglass superstructure and twin
Cummins Cummins Inc. is an American multinational corporation that designs, manufactures, and distributes engines, filtration, and power generation products. Cummins also services engines and related equipment, including fuel systems, controls, air ...
diesel engine The diesel engine, named after Rudolf Diesel, is an internal combustion engine in which ignition of the fuel is caused by the elevated temperature of the air in the cylinder due to mechanical compression; thus, the diesel engine is a so-call ...
s with conventional shafts and propellers. They were capable of light towing, and were originally fitted with demountable fire monitors. Typical boat crew was three. 207 boats were constructed at the
Coast Guard Yard The United States Coast Guard Yard or just Coast Guard Yard is a United States Coast Guard operated shipyard located on Curtis Bay in northern Anne Arundel County, Maryland, just south of the Baltimore city limits. It is the largest industrial fa ...
in Baltimore, Maryland, from 1972 to 1981. These boats replaced the Utility Boat-Large (40 feet) - Mark I, Mark IV, Mark V, and VI, which were also built by the Coast Guard's Curtis Bay Yard over the period 1950 to 1966. As of 2005 there were 172 operational boats. Beginning in 2008, these aging boats were retired and replaced with the
Response Boat-Medium Response may refer to: *Call and response (music), musical structure *Reaction (disambiguation) *Request–response ** Output or response, the result of telecommunications input *Response (liturgy), a line answering a versicle *Response (music) o ...
over a 6–10 year period. The last active boat, CG-41410 from Station Muskegon, was taken out of service in
Grand Haven, Michigan Grand Haven is a city within the U.S. state of Michigan and the county seat of Ottawa County. Grand Haven is located on the eastern shore of Lake Michigan at the mouth of the Grand River, for which it is named. As of the 2010 census, Grand Ha ...
on 31 July 2014. The 45-foot
Response Boat – Medium The Response Boat – Medium (RB-M) is a utility boat used by the United States Coast Guard. It is a replacement for the Coast Guard's retired fleet of utility boats (UTB), which had been in use by the Coast Guard since the 1970s. On June 21, ...
is the class' replacement.


Machinery characteristics

* Engine details - (2) Cummins VT-903M, 318 hp at 2600 rpm, 2:1 reduction gears * Electrical system - 24 volt DC & a 24V to 12V DC to DC converter * Propeller details - (2) 26" D X 28" P x 2" bore, 4-blade Ni-Al-bronze


Performance

* Speed, maximum at sea state 0 - 26 knots (48 km/h) * Speed, cruise at sea state 2 - 18 knots (33 km/h) at 2000 rpm * Fuel capacity (diesel) - 486.8 US gal (1,840 L) * Range at cruise, sea state 0 - 300 nm (560 km)


Other data

* Cost - $235,000 (1979)


References

{{DEFAULTSORT:Utility Boat United States Coast Guard Utility Boat Ships built by the United States Coast Guard Yard