World Library  
Flag as Inappropriate
Email this Article
 

47-foot Motor Lifeboat

A USCG 47′ MLB in Morro Bay
Class overview
Name: 47' MLB
Builders: Textron Marine
Operators:  United States Coast Guard
Cost: $1,214,300[1]
In service: 1997–Present
Planned: 227,[2] approx
Completed: 227[2]
Active: 227
General characteristics
Displacement: 18 t (20 short tons)[3]
Length: 14.6 m (47 ft 11 in)[3]
Beam: 4.27 m (14 ft 0 in)[3]
Draught: 1.37 m (4 ft 6 in)[3]
Propulsion: 2 × Detroit Diesel 6V92TA DDEC-IV engines, 435 hp (324 kW) each[3]
1,500 liter (373 usable imperial gallons) fuel capacity [3]
Speed: 25 knots (29 mph; 46 km/h) maximum
22 knots (25 mph; 41 km/h) cruising[3]
Range: 200 nmi (370 km) cruising[3]
Complement: 34 Persons, 4 crew, 30 passengers[3]
Armament: 1 × M240B machine gun (optional)[4]

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.[5]

The 47' MLB is designed to weather hurricane force winds and heavy seas, capable of surviving winds up to 60 knots (110 km/h), breaking surf up to 6 m and impacts up to three G's.[3] If the boat should capsize, it self-rights in less than ten seconds with all equipment fully functional.[3]

The boat's hull and superstructure are constructed entirely from 5456 marine grade aluminum.[3] Designed with a hard chined deep "V" planing hull,[6] the 47' MLB exceeds its displacement speed. The frame is composed of 17 vertical bulkhead frames, each of which is welded to the deck and hull, and five of which are watertight.[6]

Employing cruise-by-wire control systems,[7] the boat can be operated from four different locations: two from the enclosed bridge, and two amidships from an open bridge.[3]

Situated less than 1 ft (30 cm) above the water line are recessed retrieval wells,[7] allowing for easier recovery of persons and jetsam, and easier boardings.[3] A watertight survivor's compartment is equipped for comprehensive first aid.[7] It is situated at the combined center of rotation of the ship.[7]

See also

References

  1. ^ 47-foot Motor Lifeboat (MLB)
  2. ^ a b USCG: About Us - Aircraft & Cutters
  3. ^ a b c d e f g h i j k l m n USCG: International Affairs: FMS
  4. ^ COMDTINST M16114.25B 47FT MOTOR LIFEBOAT OPERATOR'S HANDBOOK
  5. ^ Coast Guard bids adieu to 44-foot boat - Local News Updates - The Boston Globe
  6. ^ a b Operational Logistics Support Plan (OLSP) for the 47' Motor Lifeboat (MLB)
  7. ^ a b c d Textron Marine MLB datasheet

External links

  • US Coast Guard Datasheet on the 47 MLB
  • Textron Marine contractor for the USCG 47 MLB
  • MetalCraft Marine contractor for the CCG 47 MLB
  • military.com
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 



Copyright © World Library Foundation. All rights reserved. eBooks from World Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.