X-Ray Signal Flag (X) – International Nautical Signal Flag

The X-Ray signal flag, also known as the X nautical flag, is a distinctive white flag with a blue cross that represents the letter X in the International Code of Signals. Traditionally flown by vessels to communicate a command, the X-Ray flag sends an important maritime message: “Stop carrying out your intentions and watch for my signals.” Used by mariners around the world, the X-Ray flag is a powerful symbol of caution, communication, and the precise language of the sea. Our premium X-Ray nautical signal flag is made from durable, weather-resistant 700D polyester and printed on both sides for a vibrant appearance from any direction. Whether displayed aboard a boat, strung together to spell a family name, or used as a unique piece of coastal wall décor, the X-Ray flag brings the enduring tradition of maritime communication into your home. Nautical signal flags are more than decorations—they are symbols of centuries of seafaring history. The X-Ray flag’s clean blue and white design makes it especially popular in: Sailboats and yachts Beach houses and coastal cottages Nautical-themed rooms Maritime museums and collections Personalized signal flag displays spelling names and words Ships next business day from Fall River, Massachusetts.