Response Boat – Medium

The Response Boat – Medium (RB-M) is a 45-foot (13.7m) utility boat used by the United States Coast Guard. It is intended as a replacement for the Coast Guard’s fleet of 41′ utility boats (UTB), which have been in use by the Coast Guard since the 1970s. The Coast Guard plans to acquire 180 of these RB-Ms over a 6–10 year period. The boats will be built by Kvichak Marine Industries of Kent, Washington and Marinette Marine Corporation of Marinette, Wisconsin.

According to the U.S. Coast Guard, “While primarily a Search and Rescue (SAR) asset when the 41′ UTB was first fielded, the evolution of missions has increased the requirement to perform many missions including Recreational Boating Safety (RBS), Marine Environmental Protection (MEP), Enforcement of Laws and Treaties (ELT), Ports, Waterways, and Coastal Security (PWCS) and Defense Operations (DO), including those traditional missions associated with Homeland Security.” In August 2010 the US government donated three boats for drug interdiction to Albania, where they are known as the Archangel class.

General characteristics

The boat has a deep-V, double chine hull, which provides a balance of performance and stability. The vessel is self-righting if it capsizes in rough seas. Below the pilot house are six compartments:

  • Lazarette
  • Auxiliary machinery compartment
  • Engine room
  • Survivors’ Compartment
  • Forepeak
  • Head
Length, overall: 44′ 9″ (13.7 m)
Beam, overall: 14′ 7.75″ (4.46 m)
Operational draft (full load): 3′ 4″ (1 m)
Navigational clearance: 13′ 1″ (4 m) (max) lowered; 20′ 8.25″ (6.3 m) (max) raised
Displacement: 16.3 ton
Engines: 2 × MTU Detroit Diesel turbocharged Series 60 engines, 825 hp (615.2 kW) each
Propulsion: 2 × Rolls-Royce FF-Series waterjets
Top speed: 40+ knots
Cruise speed: 30 knots (calm water)
Fuel: 510 gallons (1931 liters) diesel
Range, full load condition at 30 kts: 250 nautical miles (with 10% fuel reserve)
Towing capacity: Light displacement: 100 long tons
Weight in hoisting condition: 40,000 lbs (18,143 kg) (max)


  • Two M240B general-purpose machine guns with bow tripod and aft tow bitt mounting points
  • M16 rifle
  • Remington 870 shotgun
  • Santa Cruz Gun Lock Universal Gun Lock Systems


  • FLIR navigator thermal imager
  • Furuno Scalable Integrated Navigation System (SINS)
  • Furuno radios
  • Gentex LVIS digital intercom system
  • Taiyo TD-L1550A VHF Direction Finder
  • Motorola 5000 digital mobile radio
  • Mount for KY-99 makes RB-M ready for secure communications
  • L3 Communications Automatic Identification System (AIS)

Hull numbering

In keeping with standard USCG practice, boats of this size have hull numbers and are not named. This type of boat has a hull number beginning with the length of the boat (45′) and then a sequential number. In the case of the RB-M boats, the hull numbers begin with 601. Thus the first boat will be RB-M 45601. The Albanian boats are called Archangel 01, 02 and 03.


45601 underway on the Elizabeth River, Portsmouth, Virginia. November 21, 2008
45602 underway at Cape Disappointment, Washington. August 7, 2008

Boat Station Delivery Date
45601 Little Creek, Virginia March 2008
45602 Cape Disappointment, Washington August 2008
45603 Key West, Florida October 2008
45604 Milwaukee, Wisconsin October 2008
45605 Staten Island, New York December 2008
45606 Port Aransas, Texas January 2009
45607 Yorktown, Virginia February 2009
45608 Boston, Massachusetts March 2009
45609 San Juan, Puerto Rico May 2009
45610 Staten Island, New York July 2009
45611 Port Aransas, Texas July 2009
45612 Staten Island, New York August 2009
45613 Maui, Hawaii September 2009
45614 Staten Island, New York August 2009
45615 Little Creek, Virginia November 2009
45616 Staten Island, New York December 2009
45617 Port Canaveral, Florida November 2009
45618 Galveston, Texas January 2010
45619 Honolulu, Hawaii March 2010
45620 Castle Hill, Rhode Island November 2009
45621 Panama City, Florida January 2010
45622 Staten Island, New York December 2009
45623 St. Petersburg, Florida June 2010
45624 Cleveland Harbor, Ohio April 2010
45625 Lake Worth Inlet, Florida July 2010
45626 Belle Isle, Michigan April 2010
45627 Honolulu, Hawaii August 2010
45628 Duluth, Minnesota May 2010
45629 Castle Hill, Rhode Island June 2010
45630 Galveston, Texas June 2010
45631 Fort Lauderdale, Florida July 2010
45632 Belle Isle, Michigan August 2010
45633 Panama City, Florida August 2010
45634 Fort Pierce, Florida September 2010
45635 Duluth, Minnesota September 2010
45636 New Orleans, Louisiana September 2010
45643 Los Angeles/Long Beach, California December 2010
45651 Los Angeles/Long Beach, California March 2011
45652 Los Angeles/Long Beach, California March 2011
45703 Essexville, Michigan October 2012


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