SRHB

The SRHB, the Search and Rescue Heliboat, is a boat that uses propellers to stay afloat. It was the first modern boat in Frangfurd.

History

The SRHB was designed as an ordinary boat, floating on a large balloon under its hull. It proved too heavy for the balloon to keep afloat, and propellers were added to keep it from sinking while under way.

PLACEHOLDER: who built it, and when