Moon in Scorpio (1987)

Moon in Scorpio (1987) is the spooky tale of a boat that brings death to all who hop on board. Swedish sexbomb Britt Ekland stars as a newlywed who brings her husband and another couple on the scary yacht, where a mad slasher with a spinning blade takes to offing them one at a time. Jillian Kesner doffs her top while tanning, thereby adding some nice flesh to all the bloodletting.