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Watercraft navigation lights must permit other vessels to determine the type and relative angle of a vessel, and thus decide if there is a danger of collision. In general, sailing vessels are required to carry a green light that shines from dead ahead to 2 points (22 + 1 ⁄ 2 °) abaft [note 1] the beam on the starboard side (the right side from the perspective of someone on board facing ...
[6] [9] On a given sail, the net aerodynamic force on the sail is located approximately at the maximum draught intersecting the camber of the sail and passing through a plane intersecting the centre of effort, normal to the leading edge (luff), roughly perpendicular to the chord of the sail (a straight line between the leading edge (luff) and ...
When a small sailboat flips on its side, the keel can also be used to right the boat. Standing on the keel gives the sailor additional leverage to roll the hull upright. The centerboard, daggerboard, or bilgeboard can be used as a platform upon which to stand, providing increased leverage, in the event the dinghy overturns via a capsize or turtle.
The sail slowly spins, and these panels turn on and off to control the attitude of the vehicle. When on, they diffuse light, reducing the momentum transfer to that part of the sail. When off, the sail reflects more light, transferring more momentum. In that way, they turn the sail. [54]
The US Air Force Eastern Test Range had operational control when the ships were at sea. [2] The larger C1-M-AV-1 type ships were redesignated by the Navy as AGM. [3] The original larger ORV were out of service on the Eastern Test Range by 1969. [1] The US Air Force still operates a small fleet of drone recovery vessels nicknamed the "Tyndall Navy".
The Anderson turn (also known as a single turn) is a manoeuvre commonly used to bring a ship or boat with engines back to a point it previously passed through, often for the purpose of recovering a casualty in the quickest time possible. [1] The Anderson turn is most appropriate when the point to be reached remains clearly visible.
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A rudder is a primary control surface used to steer a ship, boat, submarine, hovercraft, airship, or other vehicle that moves through a fluid medium (usually air or water). On an airplane, the rudder is used primarily to counter adverse yaw and p-factor and is not the primary control used to turn