"robert childers" wrote in message
...
IMHO a kayak would not be an impediment to a large vessel in any of
the cases you are citing. They'd scarcely know there were bits of
fiberglass in their wake.

You're quite correct - but what if the vessel is a high speed ferry and it does
an emergency stop? The Bar Harbor Fast Cat can go from 10 knots to full stop in
110 meters, but what happens to the 900 people on board?