Interesting photo of the guy with the pedal powered yacht.
Gizmo, with your vast experience can you confirm that it is legal to sail a landyacht on public roads provided several criteria are met, namely:-
1. Alternate means of propulsion needed (pedal, electric or fuel)
2. Maximum speed 25kmph
3. Maximum power 200 watt
4. I guess brakes and a bell would be necessary too but lights (as on bikes) only needed at night.
Stephen (SN) has mentioned the requirements to me before. The speed and power limitations enables gophers and WhipperSnipper powered bicycles to be legally driven unlicenced on the road.
If so, then a pedal powered yacht with an almost totally useless drive system (lip service only) would comply.
I still intend to do the 260k round trip from Denham to the N/W Highway and return when I can, planning it for a windy moonlit night on the deserted road, but a simple/useless pedal driven wheel opens the door for me.
I put the idea to include landyachts as another category with the Solar Powered Car Darwin to Adelaide race people a while back but was rejected on several grounds. Those being we needed to demonstrate capability to travel 500km per day and no secondary means of propulsion allowed.

They were very interested though.
I wont mention how magic the weather is up here in Shark Bay.

.....Wok