If you ob serve the vessel moving RELATIVE TO THE MOST DISTANT BACK GROUND then you are not on a collision course.Ībeam - On the beam, a ~ at right angles to the centerline of the ship's keel.Īdrift - Floating free with the currents and tide, said of a freely floating object or vessel which is not moving of its own power, floating at random.Ībsolute Bearing - the bearing of an object in relation to North either True North or Magnetic North. When a boat is approaching from an angle up ahead, (c) you can tell that you are on a collision course if the ~ to that vessel remains constant (d). "two points abaft the port beam." Abandon ShipAn imperative to leave the vessel immediately, usually in the face of some imminent danger. ~ is the direction relating to the ship with the bow 0° and the stern 180°.Ībaft the beamA ~ of greater than 90 degrees from the bow. Extended to use ashore, as aboard a naval station.Ībeam - a ~ at right angles to the centerline of the ship's keel.Īdrift - anything floating and not attached to the shore or sea bed. On a ~ of 90 degrees ( abeam to starboard) or 270 degrees (abeam to port). Ī bearing relative to the direction of the ship: the clockwise angle between the ship's direction and an object. It can be given in degrees, points per quarter or the twelve hours of a clock with the bow being 12 o’clock and the stern being 6 o’clock. ~ - Direction of an object or other boat in reference to the bow. A rope is said to render when it slackens up or slips from a belaying pin or cavel.Ī bearing relative to the boat or another object, rather than a compass direction.ĭirection or bearing of an object relative to a boat's heading.Ĭrewmembers take over the operation of the vessel from those who have worked a watch. Relative bearing - Expressed in degrees, a direction in relation to the fore-and-aft line of a ship. Relative Wind - The speed and relative direction to from which the wind appears to blow with reference to a moving point (also called Apparent Wind). Relative Bearing - Bearing relative to heading or to the vessel. One might think that another vessel which seems to be progressing from, perhaps, dead ahead to apparent movement down one's starboard side cannot result in a collision. Relative bearings and true bearingsĪnother source of confusion arises from the distinction between relative bearing and absolute bearing.
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