catamarans & windvanes
I sailed on an old 36'' Piver ketch with a Hasler servo-pendulum vane. That vane wouldn''t react fast enough on a hard beat. It kept letting the port hull fly too high and made the stb hull want to stuff itself. The wind was blowing 15-20kts and seas were 3-4'' short chop (on the Bahama banks). Just rough enough to worry about a minor pitchpole. This boat was cruising and loaded heavily but still leaped off the tops of waves.