You might try plastic cable ties in different colors. Black = 100 ft, Brown = 50 ft, Red = 20 ft, blue = 5 ft. For the 125 ft mark, attach 1 black, 1 red and 1 blue cable tie. Mark every 25 ft. Keep the color key attached to the anchor locker hatch in a water proof plastic cover.
Long Beach, Ca.
s/v Namaste - 86 Catalina 30 , Tall Rig
The optimist expects the wind. The pessimist complains about the wind. The realist adjusts the sails.