International Code of Signals
The International Code of Signals (ICS) is an internationally recognized system of nautical flags, pennants, and other visual signals used by ships and boats to communicate important messages.
How The Signal Flags Work
Each letter flag has a specific meaning when displayed individually. Flags can also be combined to spell words, identify messages, or communicate specialized information.
Some well-known examples include:
- Alfa (A) — I have a diver down; keep well clear and proceed at slow speed.
- Bravo (B) — I am taking in, discharging, or carrying dangerous goods.
- Charlie (C) — Yes / affirmative.
- Delta (D) — Keep clear of me; I am maneuvering with difficulty.
- Golf (G) — I am hauling my nets.
- Hotel (H) — I have a pilot on board.
- Oscar (O) — Man overboard.
- Quebec (Q) — My vessel is healthy and I request free pratique.
- Romeo (R) — Has meanings assigned under the ICS depending on the situation.
The system also includes numeral pennants (0–9) and special substitute and answering pennants.
Great For Boats And Yachts
International Code of Signals flags are popular with sailboats, powerboats, yachts, yacht clubs, marinas, sailing schools, and maritime enthusiasts. A complete set can also make an attractive and authentic nautical display.