Specified sea areas for submarine non-combat operations including: a. Submarine sanctuaries announced by the area, fleet, or equivalent commander. b. Areas reserved for submarine operations and training in noncombat zones. c. Moving areas, established by "Submarine Notices," surrounding submarines in transit, extending 50 nautical miles ahead, 100 nautical miles behind, and 15 nautical miles on each side of the estimated position of the submarine along the stated track. See also moving havens.
Dictionary of Military and Associated Terms. US Department of Defense 2005.