[单选题]TYPHOON FORECAST MOVE 285 DEG 15 KNOT FIRST 12 HOURS THEN 280 DEG 17 KNOTS NEXT 12 HOURS．The movement of the Typhoon is in ______ quadrant．
[单选题]When action to avoid a close quarters situation is taken，a course change alone may be the most effective action provided that ______.
[单选题]During the day，a dredge will indicate the side on which it is safe to pass by displaying ________.
[单选题]A vessel, the passage of which is not to be impeded, ______ to comply with this Rule when the two vessels are approaching one another so as to involve risk of collision.
[单选题]In Admiralty Sailing Directions, heights of objects refer to the height of the structure above the ____.
[单选题]If at any time the officer in charge of the navigational watch is to be relieved when a manoeuvre or other action to avoid any hazard is taking place, ______.