Anything that leans over will simulate a distant sailing boat and be hard to see from afar.
The best racing markers don't look anything like a boat. Black is a better colour on some days.

The 'chuck it over the side' system is ok for some race marks, but if it needs to be positioned accurately [start or gate], it needs to be towed by its anchor 1st. Don't know how these buoys will react to being towed about by a rib. Might be ok.

Nice idea if your race course is a long way from the club, the RIBS don't have to tow monster marks all the way. This is the source of more damage than normal use.