Wooden Nautical Signal Flags - Rustic: rustic, wooden nautical letter signs. Each letter of the alphabet has a corresponding nautical symbol. They are frequently seen on flags, but wooden signs with nautical letters are not very common. The nautical flag numbers is great for street address, boats, docks, birthdays and special occasions. Perfect for first or last names, boat names, camp names, etc. or wherever available wall space you have available. These nautical signal flags make great birthday, special occasions, wedding shower or baby shower gifts.