SIX TYPES OF SHIP MOTION EXPLAINED!
HydroCharting NG
Survey Solutions for Hydrographic, Aerial and Oceanographic Surveying
At first glance, the ocean may appear flat, but a closer view offers a better look at the wind, currents, and wave action that influence how a ship moves in six degrees of motion: heave, sway, surge, roll, pitch, and yaw. These environmental conditions create a dynamic and ever-changing plan as the vessel navigates or moves across — not just forward and reverse, but up and down, side to side, and even heaving into the air. Regardless, all six happen in combination, and understanding how this works helps scientists, engineers, surveyors and bridge operators make informed decisions about how and where to operate the ship, and how to calibrate our technology systems.
Here is a quick look at the six planes of ship motion:
1. PITCH:???describes the up and down motion of a vessel. This is characterized by the rising and falling of the bow and stern in much the same way as a teeter-totter moves up and down.
2. ROLL:????is how we describe the tilting motion of the ship from side to side. Wind and waves push against the ship and cause it to rock back and forth.
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3. YAW:?????spins the ship on an invisible middle line similar to swiveling on a chair. This can be caused by waves moving in perpendicular to the motion of the ship and can change its heading, or direction.
4. HEAVE:???defines the up and down motion of a ship as large swells heave Nautilus vertically on the crests and troughs of waves.
5. SWAY:????this sliding motion occurs when the hull of a ship is pushed by the wind or current.
6. SURGE:??occurs when Nautilus is being followed by larger swells, which can push the vessel forward and impact the front to back motion of the ship.
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