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International Code of Signals Flags — Individual Flags & Complete Set
Shop individual International Code of Signals (ICOS) flags or choose a complete set. Select the letter flag, number pennant, repeater, or code and answering pennant you need to replace a missing flag or build your selection.
Buying individual flags? Browse the products below and choose your letter or number. Each individual product is sold separately.
Need every signal? Shop the complete 40-flag Size 3 set, made in the USA.
What are ICOS flags?
International Code of Signals flags are nautical flags used for visual communication between vessels. The system includes alphabet flags, numeral pennants, substitute flags (also called repeaters), and a code and answering pennant. Individual flags and combinations have defined meanings.
Choosing your signal flags
Shop alphabet flags A–Z, number pennants 0–9, and repeaters below. Check each product page for dimensions, attachment details, and availability. Size 3 is a size designation, not a quantity: the complete set's alphabet flags measure 2 × 2 feet, numerical pennants 16 × 36 inches, and repeaters 16 × 28 inches.
