Navy ships, have worn the flag of the National Oceanic and Atmospheric Administration as a distinctive mark. Since then, commissioned ships of the NOAA fleet, which also wear the same national ensign as U.S.

Navy ships, ships of the Survey flew the Coast and Geodetic Survey flag as a 'distinctive mark' until the newly created National Oceanic and Atmospheric Administration (NOAA) took over control of the Survey 's ships in 1970. Although they continued to wear the same ensign as U.S.

On 16 January 1899, commissioned ships of the United States Coast and Geodetic Survey were authorized to wear their own flag to distinguish them from ships of the United States Navy, with which they shared a common ensign. Jacks in the Royal Navy must be run up when the first line is ashore when coming alongside.ĭistinctive marks The flag of the National Oceanic and Atmospheric Administration, flown by all commissioned ships of the NOAA fleet as a 'distinctive mark.' However, it became an additional flag for certain other vessels and is sometimes identical with the ensign on merchant ships, depending on the ships origin.

The origin of the jack was on warships only. Jacks are flown on the bow and placed opon a jackstaff, and used when the vessel is in a port or dressed on special occasions, and not while being underway.

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