If you build a "T" shaped floating dock, and have the very end detachable from the walkway with 2 pins or bolts, you can use the very end as a motorized "boat".

Having a narrow walkway (even 4' wide) without having it attached to something much wider is like trying to walk on a floating log.

I recommend having a "T" shaped end that is 3x as wide as the walkway.

Also, the side force that wind can put on a floating dock is substantial. It's a long lever arm.

Take a 8 or 10 pound sledge hammer. Grab it right under the head and hold your arm straight out in front of your body. Now hold your upper arm along your torso and just extend your forearm. Same relative forces on a floating pier.

Ask RC51 about making a floating dock that was long and narrow. Ask him how stable it was when he walked on it....

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