Tie it to your boom or backstay and pull the cord to launch the flag. When you are done stuff the flag back in the pouch and Velcro it shut - protected from the sun. Dinghy protest size is 5.5 x 5.5 inches; keelboat protest and Yellow size is 11.5 x 11.5 inches.
Velcros to a back stay, shroud or line with a secure Velcro strip along its back side. Dinghy protest flag size is 8.5 x 8.5 inches; keelboat protest and yellow sizes are 11.5 x 11.5 inches. Rugged nylon material flies fully even in lighter air.