I had a vaguely similar experience only with anchored fishing boats instead
of rocks - damned embarrassing, and most power boaters seem to think only in
terms of "just give 'er more throttle!".
Scout

"Donal" wrote
[snip]
... after a tack, you would make leeway before you got forward motion.
Furthermore, the wind was so light that it was impossible to get forward
movement without bearing away --- which meant going even closer to the
shore.....