UTB
大型汎用艇


満載排水量:9.75t(1951年時、1980年時には10.77t) 全長:12.19m 幅:3.40m(最大) 吃水:0.96m(最大、1951年時) 主機/軸数:GMC 6-71ディーゼル2基/2軸 出力:380制動馬力 速力:26.0kt(Mk. I、鋼製、1951年時) 航続力(1951年時):15.0ktで190浬(1953年には18.0ktで450浬) 乗員:3名
A New Beginning For CG 40394. buoyjumper.
↑By the end of the 1940s, the original 38' cabin picket boats and 30' motor rescue boats were rapidly wearing out and had become obsolete given the significant increase in missions for the Coast Guard, including general marine law enforcement, recreational boating safety, environmental protection, and port security. Newer and faster designs were needed with better towing capabilities in order to respond to these operational requirements. The first new design to be developed by the Coast Guard in 1949 for this purpose was the 40' utility boat (UTB). This design was first tested by means of an extensive modification of a 38' cabin picket boat, rebuilding it to simulate the layout of the proposed 40' design. The first of these boats CG 40369 was completed in 1950. It was powered by a single GMC 6-110 Diesel 275 HP engine. Sea trials resulted in very favorable reviews and the new boat was put in service at Sandy Hook NJ Lifeboat Station. A second boat in this configuration was built but these boats were only capable of achieving a speed of 18.5 knots when 20 knots was the design criteria. Following these trials, the Coast Guard Engineering Staff decided to switch to a twin screw configuration and install 2 GMC 6-71 engines of 190 HP each. In February 1951 the wood hull CG 40371 and steel hull CG 40375 utility boats were put into service. They were turned over to The Coast Guard Field Testing and Development Unit for evaluation. The trials revealed that the steel hulled boat should be modified because the wood hulled boat provided superior comfort and resistance to pounding in heavy seas as well as drier deck surfaces. It also had better visibility for the Coxswain. The steel boat was capable of 22.5 knots and the wooden boat a little over 20 knots. With the trials completed both boats were delivered to operating units. At this point all Engineering efforts were directed to designing a steel boat with sea qualities approaching those of the wooden boat. This was accomplished by pinching in and adding a little greater flare to the bow. These simple modifications achieved a boat with better sea-riding qualities as well as an improved underwater fineness. This concluded the 40-foot Mark I design program. Mark I Utility Boat Production The Coast Guard Yard had a requirement to build 125 boats to replace those in service and to meet new requirements. The Yard had never built boats in large quantities or to a tight schedule. Therefore they set up a production line with prefabricated sub-assemblies. This assembly line technique commenced operation in June 1951. The planned rate of delivery was one boat per day and this was reached in July 1951 and continued for the construction of over 100 boats. During this time 15 Model 1 wooden boats were built as well and additional steel boats for the US Navy and the Military Assistance Program. In 1951, the Coast Guard Yard built 27 Mark I Model 2 boats for the French Navy for service in Viet Nam. No interior control station was installed, a 50 Cal. Machine gun mount on bow and a 20 mm Cannon on the stern in place of tow bit. In 1955, the remainders of these boats were transferred to start the South Viet Nam Navy. Mark II Utility Boat. The Coast Guard Yard built one twin screw 40-foot Utility boat with a marine plywood hull in November 1951. The mechanical components of the Mark I boats were installed: Twin GMC 6-71 Diesel engines and 20" x 18" propellers. She had a cruise speed of 18.5 knots and a 192 mile range. She was attached to the Yard's Testing and Development Division of the Office of Engineering for evaluation. Mark III Utility Boat In 1952 and 1953, the Coast Guard contracted with Anchorage Plastics Corp. of Warren, RI to build 3 single screw plastic 40-foot Utility boats. The mechanical components of the Mark I boats were installed: Twin 3 GMC 6-71 Diesel engines and 20" x 18" propellers. She had a cruise speed of 20 knots and a 192 mile range. One of these boats was attached to the Yard's Testing and Development Division of the Office of Engineering for evaluation. 40-foot Utility Boat Competition In May 1952 a comparative operational test was conducted by the Coast Guard Yard's Testing and Development Unit utilizing one Mark I Steel UTB, one Mark II Plywood UTB, and one Mark III Plastic UTB. These boats were comparison tested during the period of 9 June through 4 July between Norfolk, VA and Cape May, NJ. These tests concluded that although there were certain areas where each boat excelled, the steel boat's superior ruggedness made it capable of withstanding the greatest amount of abuse. Mark IV Utility Boat In 1954, the Utility boats had been in service for 18 months. The Office of Search and Rescue had recommended certain configuration changes. The Coast Guard Naval Engineering section drafted plans for a Mark IV version of the 40-foot UTB. The changes incorporated in the Mar IV version were: Engines and Pilothouse were moved 2 feet aft. Refinement to the propeller shaft struts, rudders, and aft parts of the hull bottom. Enlarged fuel tanks increasing capacity from 228 gallons to 370 gallons. (Subsequent trials indicated that this increased the boats speed by 4 knots and range by 175 miles.) Canvas Canopy installed over the outside steering station. Mark IV Mod. 1 Utility Boat In 1955, the Mark IV Mod. 1 was developed. The modification included: Redesign Cabin Windows. Remove Engine Box Louvers Lighted Instrument Panels. Use of Plexiglas discontinued. Coxswain's platform on outside station raised. Pilothouse door hinged to swing outward. The steel 40-foot utility boat building program was completed in 1959. Mark V Utility Boat In 1959, the Coast Guard contracted with W.R. Chance and Associates of Waldorf, MD to build one plastic and fiberglass single screw utility boat of Coast Guard design. The boat was designed for Captain of the Port (COTP) surveillance and inshore rescue duties. This boat was attached to the Yard's Testing and Development Division of the Office of Engineering for evaluation. Following sea trials, she was assigned to an operating unit. Mark V Mod. 1 Utility Boat In 1961, the Coast Guard contracted with Universal Molded Fiberglass to build seven Mark V Mod. 1 single screw plastic and fiberglass boats. She was powered by a GMC 6-71 Model 612IT 300 HP @ 2300 RPM with a V-drive. The single screw boat proved not to be as efficient as the twin screw boats. The single engine V-drive proved not to be reliable. Mark VI Utility Boat In 1962, the unreliability of the Mark V, Mod. 1 led to the development of the Mark VI plastic boat. The Mark VI was designed with twin Cummins V-6 Turbo-charged diesel engines producing 260 HP @3000 RPM to increase speed and durability. She had a speed of 25 knots and a range of 200 miles. The Coast Guard Yard constructed 13 Mark VI boats between 1962 and 1966. The UTB building program ended in 1966. Image courtesy of Shipbucket.
船名 NAME 船種記号 建造所 就役日 退役日 除籍日 備考
40369 ◎1950年9月8日竣工、木製、1軸、プロトタイプ
◎Station: Sandy Hook.
40370 ◎1950年9月8日竣工、木製、1軸、プロトタイプ
◎Station: New York.
40371 ◎1隻、1951年竣工、木製、2軸、プロトタイプ
40372、40373、40376〜40390 ◎17隻、1951年竣工、Mk. Iモデル1、木製、2軸
40375 ◎1隻、1951年竣工、鋼製、2軸、プロトタイプ
◎Station: Race Point, Woods Hole, Portsmouth Harbor, Menemsha.
40391〜40491、40493〜40501、40505〜40518 ◎131隻、1951年〜1952年竣工、Mk. I、鋼製、2軸
40492 ◎1隻、1951年竣工、Mk. II、合板製、2軸
40502〜40504 ◎3隻、1952年〜1953年竣工、Mk. III、プラスチック製、2軸
40519〜40547 ◎26隻、1953年〜1954年竣工、Mk. IV、鋼製、2軸
40548〜40589 ◎40隻、1955年〜1959年竣工、Mk. IV Mod. 1、鋼製、2軸
CG-40585は1958年8月10日に喪失
40043 ◎1隻、1959年竣工、Mk. Vプロトタイプ、プラスチック製、1軸
40590〜40596 ◎7隻、1961年竣工、Mk. V Mod. 1、プラスチック製、1軸
40597〜40609 ◎13隻、1962年〜1966年5月16日竣工、Mk. VI、プラスチック製、2軸


満載排水量:13.60t 全長:12.59m 幅:4.29m(最大) 吃水(平均):1.24m(満載時) 主機/軸数:Cummins式ディーゼル2基/2軸 出力:636馬力 速力:26.0kt 航続力:18.0ktで300浬 乗員:3名(救助者20名、もしくは物資1.81tを塔載)
※計208隻、1971年〜1983年建造
↑41-foot Utility Boat (No. 41353)
船名 NAME 船種記号 建造所 就役日 退役日 除籍日 備考
41300 Coast Guard Yard
◎Station: Manasquan Inlet.
41301 Coast Guard Yard
◎Station: Rockaway, Montauk.
41302 Coast Guard Yard
◎Station: Mayport, San Juan.
41303 Coast Guard Yard
◎Station: San Francisco, Little Creek, Training Center Yorktown, Va.
41304 Coast Guard Yard
◎Station: Boston, Merrimack River.
41305 Coast Guard Yard
◎Station: Scituate.
41306 Coast Guard Yard
◎Station: Belle Isle.
41307 Coast Guard Yard
◎Station: Training Center Yorktown, Va.
41308 Coast Guard Yard
◎Station: Toledo.
41309 Coast Guard Yard
◎Station: New Haven.
41310 Coast Guard Yard
◎Station: Cape May.
41311 Coast Guard Yard
◎Station: Base Gloucester, N.J.; Philadelphia; St. Inigoes.
41312 Coast Guard Yard
◎Station: Castle Hill, San Diego, Training Center Yorktown, Va.
41313 Coast Guard Yard
◎Station: Grays Harbor, Honolulu.
41314 Coast Guard Yard
◎Station: Grays Harbor.
41315 Coast Guard Yard
◎Station: Neah Bay.
41316 Coast Guard Yard
◎Station: Seattle, Mayport, Willapa.
41317 Coast Guard Yard
◎Station: Honolulu.
41318 Coast Guard Yard
◎Station: Key West.
41319 Coast Guard Yard
◎Station: Port Canaveral.
41320 Coast Guard Yard
◎Station: Castle Hill, Menemsha, Woods Hole.
41321 Coast Guard Yard
◎Station: Woods Hole, Castle Hill.
41322 Coast Guard Yard
◎Station: Mobile, Destin.
41323 Coast Guard Yard
◎Station: Port Isabel.
41324 Coast Guard Yard
◎Station: Kenosha, Sheboygan.
41325 Coast Guard Yard
◎Station: Milwaukee, Kenosha.
41326 Coast Guard Yard
◎Station: Ketchikan.
41327 Coast Guard Yard ◎後に船種を航空機練習艇に改める
◎Station: Port Angeles.
41328 Coast Guard Yard
◎Station: Juneau.
41329 Coast Guard Yard
◎Station: Miami Beach.
41330 Coast Guard Yard
◎Station: St. Inigoes, Los Angeles.
41331 Coast Guard Yard
◎Station: Los Angeles.
41332 Coast Guard Yard 1977/11 Columbia River Barにて夜間航行訓練中、転覆
◎Station: Tillamook Bay (capsized and sunk Nov. 1977).
41333 Coast Guard Yard
◎Station: New London.
41334 Coast Guard Yard
◎Station: Cape May.
41335 Coast Guard Yard ◎運用終了後、業者に払い下げられ売りに出される
◎Station: District 13 Spare.
41336 Coast Guard Yard
◎Station: Barnegat, Hatteras Inlet.
41337 Coast Guard Yard
◎Station: New London, Woods Hole.
41338 Coast Guard Yard
◎Station: Charleston.
41339 Coast Guard Yard
◎Station: St. Simons Island, Brunswick.
41340 Coast Guard Yard
◎Station: Mayport, Cortez.
41341 Coast Guard Yard
◎Station: Fort Pierce Inlet.
41342 Coast Guard Yard
◎Station: Montauk, New York.
41343 Coast Guard Yard
◎Station: Shinnecock.
41344 Coast Guard Yard
◎Station: Great Egg, Wrightsville Beach.
41345 Coast Guard Yard
◎Station: Panama City.
41346 Coast Guard Yard
◎Station: Grand Isle.
41347 Coast Guard Yard
◎Station: Buffalo, Fairport.
41348 Coast Guard Yard
◎Station: Ketchikan.
41349 Coast Guard Yard
◎Station: Short Beach, New York.
41350 Coast Guard Yard
◎Station: New London, Portsmouth Harbor.
41351 Coast Guard Yard
◎Station: Miami Beach, Fort Lauderdale.
41352 Coast Guard Yard
◎Station: Fort Lauderdale.
41353 Coast Guard Yard
◎Station: Gloucester, Mass. During a 1977 rescue, CG-41353 from Station Gloucester withstood winds of 50-60 knots and seas of about 20 feet.
41354 Coast Guard Yard
◎Station: Boston, Point Allerton.
41355 Coast Guard Yard
◎Station: Pascagoula.
41356 Coast Guard Yard
◎Station: Freeport.
41357 Coast Guard Yard
◎Station: Niagara.
41358 Coast Guard Yard
◎Station: Base Gloucester, N.J.; Philadelphia.
41359 Coast Guard Yard
◎Station: Curtis Bay.
41360 Coast Guard Yard
◎Station: Mobile, Barnegat.
41361 Coast Guard Yard
41362 Coast Guard Yard
41363 Coast Guard Yard
41364 Coast Guard Yard
41365 Coast Guard Yard
41366 Coast Guard Yard
41367 Coast Guard Yard
41368 Coast Guard Yard
41369 Coast Guard Yard
41370 Coast Guard Yard
41371 Coast Guard Yard
41372 Coast Guard Yard
41373 Coast Guard Yard 2007年にTV・ラジオ・ネットワーク会社CBS放送のTVドラマ「CSI:ニューヨーク CSI: NY (Season 4, Episode 2)」撮影用に用いられる。2008年にTV・ラジオ・ネットワーク会社CBS放送のTVドラマ「CSI:マイアミ CSI: Miami (Season 7, Episode 1)」撮影用に用いられる
◎Station: Los Angeles.
41374 Coast Guard Yard
41375 Coast Guard Yard
41376 Coast Guard Yard
41377 Coast Guard Yard
41378 Coast Guard Yard
41379 Coast Guard Yard
41380 Coast Guard Yard
41381 Coast Guard Yard
41382 Coast Guard Yard
41383 Coast Guard Yard
41384 Coast Guard Yard
41385 Coast Guard Yard
41386 Coast Guard Yard
41387 Coast Guard Yard
41388 Coast Guard Yard
41389 Coast Guard Yard
41390 Coast Guard Yard
41391 Coast Guard Yard
41392 Coast Guard Yard
41393 Coast Guard Yard
41394 Coast Guard Yard
41395 Coast Guard Yard
41396 Coast Guard Yard
41397 Coast Guard Yard
41398 Coast Guard Yard
41399 Coast Guard Yard
41400 Coast Guard Yard
41401 Coast Guard Yard
41402 Coast Guard Yard
41403 Coast Guard Yard ◎後に船種を航空機練習艇に改める
◎Station: Air Station Sitka, Alaska.
41404 Coast Guard Yard
41405 Coast Guard Yard ◎後に船種を航空機練習艇に改める
◎Station: Ashtabula; Air Station Kodiak, Alaska.
41406 Coast Guard Yard
41407 Coast Guard Yard
41408 Coast Guard Yard
41409 Coast Guard Yard
41410 Coast Guard Yard 退役後、Sturgeon Bay Maritime Museumにて展示
◎Station: Milwaukee.
41411 Coast Guard Yard
41412 Coast Guard Yard
41413 Coast Guard Yard
41414 Coast Guard Yard
41415 Coast Guard Yard
41416 Coast Guard Yard
41417 Coast Guard Yard
41418 Coast Guard Yard
41419 Coast Guard Yard
41420 Coast Guard Yard
41421 Coast Guard Yard
41422 Coast Guard Yard
41423 Coast Guard Yard
41424 Coast Guard Yard
41425 Coast Guard Yard
41426 Coast Guard Yard
41427 Coast Guard Yard
41428 Coast Guard Yard
41429 Coast Guard Yard
41430 Coast Guard Yard
41431 Coast Guard Yard
41432 Coast Guard Yard
41433 Coast Guard Yard
41434 Coast Guard Yard
41435 Coast Guard Yard
41436 Coast Guard Yard
41437 Coast Guard Yard
◎Station: U.S. Army Corps of Engineers.
41438 Coast Guard Yard ◎後に陸軍工兵隊に移管
41439 Coast Guard Yard ◎後に陸軍工兵隊に移管
41440 Coast Guard Yard ◎後に陸軍工兵隊に移管
41441 Coast Guard Yard ◎後に陸軍工兵隊に移管
41442 Coast Guard Yard ◎後に陸軍工兵隊に移管
41443 Coast Guard Yard ◎後に陸軍工兵隊に移管
41444 Coast Guard Yard ◎後に陸軍工兵隊に移管
41445 Coast Guard Yard ◎後に陸軍工兵隊に移管
41446 Coast Guard Yard ◎後に陸軍工兵隊に移管
41447 Coast Guard Yard ◎後に陸軍工兵隊に移管
41448 Coast Guard Yard ◎後に陸軍工兵隊に移管
41449 Coast Guard Yard ◎後に陸軍工兵隊に移管
41450 Coast Guard Yard 2007年にTV・ラジオ・ネットワーク会社CBS放送のTVドラマ「CSI:マイアミ CSI: Miami (Season 6, Episode 1)」撮影用に用いられる
◎後に陸軍工兵隊に移管
◎Station: Coinjock.
41451 Coast Guard Yard ◎後に陸軍工兵隊に移管
41452 Coast Guard Yard ◎後に陸軍工兵隊に移管
41453 Coast Guard Yard ◎後に陸軍工兵隊に移管
41454 Coast Guard Yard ◎後に陸軍工兵隊に移管
41455 Coast Guard Yard ◎後に陸軍工兵隊に移管
41456 Coast Guard Yard ◎後に陸軍工兵隊に移管
41457 Coast Guard Yard ◎後に陸軍工兵隊に移管
41458 Coast Guard Yard ◎後に陸軍工兵隊に移管
41459 Coast Guard Yard ◎後に陸軍工兵隊に移管
41460 Coast Guard Yard ◎後に陸軍工兵隊に移管
41461 Coast Guard Yard ◎後に陸軍工兵隊に移管
41462 Coast Guard Yard ◎後に陸軍工兵隊に移管
41463 Coast Guard Yard ◎後に陸軍工兵隊に移管
41464 Coast Guard Yard ◎後に陸軍工兵隊に移管
41465 Coast Guard Yard ◎後に陸軍工兵隊に移管
41466 Coast Guard Yard ◎後に陸軍工兵隊に移管
41467 Coast Guard Yard ◎後に陸軍工兵隊に移管
41468 Coast Guard Yard ◎後に陸軍工兵隊に移管
41469 Coast Guard Yard ◎後に陸軍工兵隊に移管
41470 Coast Guard Yard ◎後に陸軍工兵隊に移管
41471 Coast Guard Yard ◎後に陸軍工兵隊に移管
41472 Coast Guard Yard ◎後に陸軍工兵隊に移管
41473 Coast Guard Yard ◎後に陸軍工兵隊に移管
41474 Coast Guard Yard ◎後に陸軍工兵隊に移管
41475 Coast Guard Yard ◎後に陸軍工兵隊に移管
41476 Coast Guard Yard ◎後に陸軍工兵隊に移管
41477 Coast Guard Yard ◎後に陸軍工兵隊に移管
41478 Coast Guard Yard ◎後に陸軍工兵隊に移管
41479 Coast Guard Yard ◎後に陸軍工兵隊に移管
41480 Coast Guard Yard ◎後に陸軍工兵隊に移管
41481 Coast Guard Yard ◎後に陸軍工兵隊に移管
41482 Coast Guard Yard ◎後に陸軍工兵隊に移管
41483 Coast Guard Yard ◎後に陸軍工兵隊に移管
41484 Coast Guard Yard ◎後に陸軍工兵隊に移管
41485 Coast Guard Yard ◎後に陸軍工兵隊に移管
41486 Coast Guard Yard ◎後に陸軍工兵隊に移管
41487 Coast Guard Yard ◎後に陸軍工兵隊に移管
41488 Coast Guard Yard ◎後に陸軍工兵隊に移管
41489 Coast Guard Yard ◎後に陸軍工兵隊に移管
41490 Coast Guard Yard ◎後に陸軍工兵隊に移管
41491 Coast Guard Yard ◎後に陸軍工兵隊に移管
41492 Coast Guard Yard ◎後に陸軍工兵隊に移管
41493 Coast Guard Yard ◎後に陸軍工兵隊に移管
41494 Coast Guard Yard ◎後に陸軍工兵隊に移管
41495 Coast Guard Yard ◎後に陸軍工兵隊に移管
41496 Coast Guard Yard ◎後に陸軍工兵隊に移管
41497 Coast Guard Yard ◎後に陸軍工兵隊に移管
41498 Coast Guard Yard ◎後に陸軍工兵隊に移管
41499 Coast Guard Yard ◎後に陸軍工兵隊に移管
41500 Coast Guard Yard ◎後に陸軍工兵隊に移管
41501 Coast Guard Yard ◎後に陸軍工兵隊に移管
41502 Coast Guard Yard ◎後に陸軍工兵隊に移管
41503 Coast Guard Yard ◎後に陸軍工兵隊に移管
41504 Coast Guard Yard ◎後に陸軍工兵隊に移管
41505 Coast Guard Yard ◎後に陸軍工兵隊に移管
41506 Coast Guard Yard ◎後に陸軍工兵隊に移管
41507 Coast Guard Yard ◎後に陸軍工兵隊に移管
◎Station: San Francisco.


Update 18/02/18