Dynamic Positioning

The DP System maintains a vessel’s desired position and/or heading by use of the DP control computer which automates the control of vital power and propulsion systems to control 3 of 6 axes of a vessel’s movement:
• surge (aft and forward),
• sway (side to side), and
• yaw (heading).
DP Systems are complex and rely on the harmonization of hardware, software,
machinery and human interfaces to properly maintain the vessel in a fixed position.
The failure of one or more of these systems could result in a potentially catastrophic
event. To properly inspect the DP System, it is imperative that marine inspectors
have knowledge and understanding of how the system works as a whole