Description

International Code of Signals Flag — Letter Charlie (C)

The International Code of Signals Letter Charlie (C) Flag serves an important role within the internationally recognized maritime signaling system. As a result, mariners rely on it aboard commercial vessels, naval ships, and recreational boats to communicate operational intentions clearly.

These signal flags allow vessels to exchange standardized messages visually. Moreover, they remain especially valuable when radio or electronic communication becomes restricted. Consequently, the Charlie flag supports coordinated navigation and safe vessel movement across busy waterways.

International Code of Signals — Letter Meaning

Letter: C
Code Word: Charlie
Pronunciation: CHAR-LEE
Single-Letter Meaning: Yes (affirmative).

Because this signal confirms agreement or acknowledgment, vessels commonly display the Charlie flag during coordinated maneuvers, training exercises, and harbor communications.

Made by Advertising Flag Company — Marine-Grade Construction

Advertising Flag Company / FlagPro proudly manufactures all International Code of Signals flags, ensuring consistent quality throughout the entire Code of Signals series.

Each flag uses Glaser Mills marine-grade nylon, which provides excellent strength, long-lasting color retention, and reliable resistance to sun, wind, and saltwater exposure. In addition, the lightweight weave allows the flag to fly cleanly and respond quickly to wind. Therefore, visibility remains clear during active signaling conditions.

Available Sizes — International Code of Signals Standards

The Letter Charlie (C) flag is available in multiple standardized signal sizes. As a result, mariners can select the appropriate scale for different vessels and display requirements.

• Size #0: 12″ × 15″ (30 × 38 cm)

• Size #2: 18″ × 24″ (45 × 60 cm)

• Size #3: 24″ × 24″ (60 × 60 cm)

• Size #7: 36″ × 36″ (91 × 91 cm)

• Size #10: 48″ × 48″ (121 × 121 cm)

• Size #14: 48″ × 72″ (121 × 182 cm)

Because these dimensions follow international standards, the Charlie flag integrates seamlessly when flown individually, as part of a full hoist, or within instructional signal displays.

Canvas Heading with Solid Brass Grommets

Each International Code of Signals flag includes a canvas heading with solid brass grommets, which serves as the only and standard finishing option for this series.

This traditional marine finish provides secure attachment to halyards and signal lines. Additionally, it delivers long-term durability for repeated hoisting and extended outdoor use in demanding marine environments.

Related Nautical & Custom Marine Flags

To complete your marine signaling setup, pair this International Code of Signals Flag with other nautical and boat flags available at FlagPro.com. As a result, vessels can maintain a cohesive and professional signaling display.

For specialized needs, explore Custom Digitally Printed Nylon Flags — Made in the USA, which work especially well for marina identifiers, event signaling, and vessel-specific designs.

You can also browse the full collection of Nautical & Boat Flags to expand your onboard signaling options.

Part of the Complete International Code of Signals Collection

The Letter Charlie (C) flag forms part of the International Code of Signals system, which includes Letters A through Z, Numerals 0 through 9, and Substitute flags.

Together, these flags allow vessels to display complete standardized messages while maintaining compliance with international maritime signaling practices.