Power boat skippers often have a kill switch lanyard clipped to them that shuts off the motor if they fall overboard [or forget and just step away from the helm]. This means the boat may be close enough for a solo skipper overboard to self-rescue, and it certainly announces the man overboard to any crew so they can do a rescue.
Any sailboat equivalent?
Sort of. Man Overboard Beacons can be hooked to an auto-pilot that will hard over the rudder when set off. However, worth noting that simply getting back into the boat, self-rescue, can be a challenge if the boat isn't properly prepared and equipped and doubly so in colder waters.
WARNING & DISCLAIMER:
SELECT AND USE OUTDOORS AND SURVIVAL EQUIPMENT, SUPPLIES AND TECHNIQUES AT YOUR OWN RISK. Information posted
on this forum is not reviewed for accuracy and may not be reliable, use at your own risk. Please
review the full WARNING & DISCLAIMER about information on this
site.