The B flag, or Bravo flag, is used to represent the alphabetic character B for use in a message between boats. It also means 'I am taking in, discharging, or carrying dangerous cargo'. From the International Code of Signals, this long-lasting nautical flag is made from nylon fabric with double-stitched seams, canvas heading with grommets. Measures 12 in. x 18 in. Made to order. Allow 4 to 6 weeks for delivery.