The USCG has since designed and built new aluminum 47-foot (14 m) lifeboats and the first production boat was delivered to the USCG in 1997.
The 47 MLB is able to withstand impacts of three times the acceleration of gravity, can survive a complete roll-over and is self-righting in less than 10 seconds with all machinery remaining fully operational. The 47 MLB can travel at 25 knots (46 km/h) to reach her destination.
There are 117 operational with a total of 200 scheduled to be delivered to the USCG. A further 27 models are being built by MetalCraft Marine under license to the Canadian Coast Guard.