Vessel Movement�(caused by the action of the waves as the vessel moves through the water)
Vessel Movement�(caused by the action of the waves as the vessel moves through the water) :
A vessel at sea may move in six different directions at the same time: (1) Heave - Rise or fall of the entire vessel. (2) Surge - Forward or aft movement of the entire vessel. (3) Sway - Sideways movement of the entire vessel. (4) Pitch - Rise and fall motion (bow and stern) on the width center axis. (5) Roll - Side to side (port and starboard) rocking motion on the length center axis. (6) Yaw - Port and starboard twisting motion on the vertical center axis
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