The C flag, or Charlie flag, is used to represent the alphabetic character C for use in a message between boats. It also means ' Yes' or ' Affirmative'. From the International Code of Signals, this long-lasting nautical flag is made from nylon fabric with double-stitched seams, canvas heading with grommets. Measure 2 ft. x 3 ft. Made to order. Allow 4 to 6 weeks for delivery.