The Motor Life Boat (MLB) is an integral part of a Coast Guard fleet, built to withstand the most severe conditions at sea. Designed to be self-bailing, self-righting and practically unsinkable, lifeboats are used as a heavy weather surf rescue response platform manned by the brave men who go out in conditions that send even hardened sailors scurrying for high ground. During the 1960's the Coast Guard replaced the venerable 36 foot MLB, seen with the CG36500, with the newly designed 44 foot (13 m) boat, seen in the background. These steel-hulled boats were more capable and more complicated than the wooden lifeboats they replaced.