Vessel Motion
Flashing Light
Watch Training Workbook
Campus Life
The Joe Show
Deck Skills
Celestial Nav.
Ship Structure
Rules of the Road
Ship and Cargo Ops.
Shipping Info
Shanties and Sea Lore
World Port/Drink Guide

Because it's not the size of the vessel, but the motion of the ocean...

Vessels sometimes move in mysterious ways... so we need a way to describe that motion.
First, think of three axis through the ship. All motion happens along or around these axis. Think of each axis as a pole, and motion either rides up and down the pole or slides around it.
FYE: when a ship is said to move bodily, the whole ship maintains current list, trim, and heading, but moves in a steady direction without rotating at all.
The first axis is the vertical.
-Heaving: when a ship moves vertically up and down bodily
-Yawing: when a ship rotates about the vertical axis (when the vessel turns)
The second axis is the longitudinal, running from the bow to the stern:
-Surging: when a ship moves bodily along the longitudinal axis fore or aft
-Rolling: when a ship rotates about the longitudinal axis (the ship lists to one side or the other)
The last axis is the transverse, running from the port side to starboard:
-Sway: when a ship moves bodily along the transverse axis from side to side
-Pitch: when the ship rotates about the transverse axis, (the bow or stern rises while the other end does the opposite)