pilotage waters

pilotage waters

[′pī·lət·ij ‚wȯd·ərz]
(navigation)
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State law requires a vessel bigger than 65 feet registered outside of the United States to staff a state-licensed marine pilot during trips through mandatory pilotage waters, defined as the thresholds to Alaska waterways within around three nautical miles of the coastline.
The board saw that Greenpeace had entered mandatory pilotage waters around Point Hope on Alaska's North Slope between July 22 and 27 with no state-licensed marine pilot on board.
It may be the case that this was the master's practice, but if so it was a practice contrary to that which his owners thought was good practice in pilotage waters and restricted visibility.