Abstract: Sea-going lifeboats made of thin-walled, fiberglass-reinforced plastic (F-R P), with an oversupply of poured-in-place urethane foam in functionally advantageous spaces; having totally watertight or weathertight covers; with bow-pull hand-propeller replacing rowing oars. A hand driven, multi-purpose flywheel for Diesel engine starting, dynamo for lights and radio, et-cetera; with hanging steel pipe structure in the bilge supporting heavy items, which are compacted close to the keel. Outer hull doubling allows space for stowage of an automatic inflatable rubber air tube on each side of the lifeboat.