47-foot Motor Lifeboat

	CG-47231, a USCG 47' MLB in the surf zone off the coast of Morro Bay
Class overview
Name	47′ MLB
Builders	Textron Marine
Operators	United States Coast Guard; Maritime Search and Rescue (Mexico);
Preceded by	44-foot motor lifeboat
Cost	$1,214,300
In service	1997–present
Planned	c. 227
Completed	227
Active	227
General characteristics
Displacement	18 t (20 short tons)
Length	14.6 m (47 ft 11 in)
Beam	4.27 m (14 ft 0 in)
Draft	1.37 m (4 ft 6 in)
Propulsion	2 × Detroit Diesel 6V92TA DDEC-IV engines, 435 hp (324 kW) each; 1,500 L (400 US gal) usable fuel capacity ;
Speed	25 knots (29 mph; 46 km/h) maximum; 22 knots (25 mph; 41 km/h) cruising;
Range	200 nmi (370 km) cruising
Complement	34 persons, 4 crew, 30 passengers
Armament	1 × M240B machine gun (optional)

The 47-foot MLB is the standard lifeboat of the United States Coast Guard (USCG). The 47′ MLB is the successor to the 44′ MLB, which were in service from 1963 until 2009.

Class overview
CG-47231, a USCG 47' MLB in the surf zone off the coast of Morro Bay
Name	47′ MLB
Builders	Textron Marine
Operators	United States Coast Guard Maritime Search and Rescue (Mexico)
Preceded by	44-foot motor lifeboat
Cost	$1,214,300
In service	1997–present
Planned	c. 227
Completed	227
Active	227
General characteristics
Displacement	18 t (20 short tons)
Length	14.6 m (47 ft 11 in)
Beam	4.27 m (14 ft 0 in)
Draft	1.37 m (4 ft 6 in)
Propulsion	2 × Detroit Diesel 6V92TA DDEC-IV engines, 435 hp (324 kW) each 1,500 L (400 US gal) usable fuel capacity
Speed	25 knots (29 mph; 46 km/h) maximum 22 knots (25 mph; 41 km/h) cruising
Range	200 nmi (370 km) cruising
Complement	34 persons, 4 crew, 30 passengers^{: §A.4.b., p.2–5}
Armament	1 × M240B machine gun (optional)^{: §K, p.3–57}