ROV nomenclature follows the general pattern for seagoing vessels. The image below provides a visual reference for the directions and attitude relative to the ROV.
ROV Orientation and Directions Reference
Bow – The front of the ROV.
Stern – The rear of the ROV
Port – The left side of the ROV when facing forward.
Starboard – The right side of the ROV when facing forward.
Fore – Towards the front or The forward direction.
Aft – Towards the rear of the rearward direction.
Surface – To ascend or move up in the water column to a shallower depth.
Dive – To descend or move down in the water column to a deeper depth.
ROV Attitude and Motion Reference
Surge – Forward and Reverse motion of the ROV, forward is positive.
Heave – Up and Down motion of the ROV, up is positive.
Sway – Left (to port) and Right (to starboard) lateral motion of the ROV, left is positive.
Yaw – Right (to starboard) and Left (to port) rotational motion of the ROV, right (clockwise, viewed from the top) is positive.
Pitch – Bow Up or Bow Down inclination of the ROV, bow up (clockwise, viewed from the port side) is positive.
Roll – Port UP or Port Down relative to Starboard, port up (clockwise, viewed from the rear) is positive.
The Pro 5 does note support Sway, Pitch or Poll motions due to its thruster arrangement.
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