Some British sailboats fly a white or blue ensign because they belong to certain yacht clubs or organisations that have special permission to use these ensigns. The white ensign is a variation of the national flag that is normally used by the Royal Navy, but it can also be worn by yachts owned by members of the Royal Yacht Squadron, which is a privileged yacht club with a long history and close ties to the monarchy. The blue ensign is another variation of the national flag that is normally used by government vessels, but it can also be worn by yachts that belong to one of the 32 yacht clubs or associations that have a warrant from the Admiralty or the relevant authority to use the undefaced blue ensign. Additionally, some yachts can wear a blue ensign defaced with the badge of their club or association, if they have a warrant for that as well. There are 57 yacht clubs or associations that have this privilege. These special or privileged ensigns are considered a mark of distinction and honour, and they should only be flown with proper authorisation and following the rules and regulations of wearing them.