Searunner 37 trimaran

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The only photo we have of this boat shows an Auto-helm airvane & mast assembly rigged to an owner-built trimtab on the boat's own rudder. Note that the "Brown 37 trimaran" is a similar boat with a spade rudder.

Images of Auto-helm: 1

Searunner 37 trimaran
Auto-helm
Unknown boat name and home port