Features of the design were evaluated including the in water assembly of the foil system and the storage of the vehicle in a torpedo tube. The launching of the vehicle and the shore side submergence and retrieval demonstration were held in abeyance pending the arrival of a suitable outboard engine. Such an engine never arrived. The reliability of an outboard, submerged for lengthy periods was not established. With the lack of a suitable engine, interest in the project waned and finally the concept was abandoned.
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