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wrote:

The length is somewhat limited because people don't want
to tow a boat that's too long. I've been thinking about making
a retractable bow which may be hinged at the top or have two
side pieces (attached to rails at the top) which slide forward
to meet in the center.

You could plant a foot on each section and surf your way across.
If it works you become rich & famous. Let us know how it works out.