🔍 Key Concepts

• Ship motions and axes: roll, pitch, and yaw are each tied to a specific axis • The three main axes of a vessel: longitudinal (bow to stern), transverse (side to side), and vertical (keel to mast) • How angular motion differs from straight-line (linear) motion

💭 Think About

• First, recall what yawing physically looks like when a ship is moving—how does the bow move relative to the horizon? • Next, match that motion to an axis: which axis does the ship rotate around when its heading swings left or right? • Eliminate the axes that are clearly related to rolling (side-to-side tilt) and pitching (bow up and down) so only one remains for yawing.

✅ Before You Answer

• Be clear on which axis runs bow to stern, which runs side to side, and which is up and down • Match roll, pitch, and yaw each to one unique axis before choosing your answer • Verify that the axis you choose is the one about which the vessel’s heading changes left/right rather than tilting up/down or side/side