Dynamic Positioning System (DP) Praxis

The Mega-Guard Dynamic Positioning System (DP) automatically controls a vessel's heading and position by activating thrusters based upon data as received from position reference systems, gyrocompasses, wind sensors and motion reference units. The Auto Track mode allows the ship to move along a pre-defined track at low speed as defined by the operator. The Mega-Guard Joystick Control System (JC) is a basic version of the Mega-Guard DP system and allows the operator to automatically control the heading and manually position the vessel based upon data as received from gyrocompasses and wind sensors. The Mega-Guard DP and JC system are based upon the field-proven products of the Mega-Guard product line and the experience as gained on the design and delivery of joystick control systems as supplied on many different kind of vessels since 1980 (see reference list). The Mega-Guard DP and JC system are suited for e.g. supply vessels, tug boats, dredgers, cable and pipe laying vessels, FPSO's, heavy lift vessels and mega-yachts in full accordance with the applicable classification and IMO rules (DP1, DP2and DP3).

• Joystick Manual Heading Mode: The operator manually controls the position of the vessel via Joystick and the heading is controlled via the Heading Knob.
• Joystick Auto Heading Mode: The operator manually controls the position of the vessel via Joystick and the heading is kept automatically to the Set Heading.
• Auto Position Mode: Station keeping. The position of the vessel is kept automatically to Set Position and the heading is kept automatically to the Set Heading. The Set Position can have absolute coordinates (Northings and Eastings) or relative coordinates (relative from e.g. a platform).
• Auto Track Mode: The vessel's heading is kept to Set Heading and the operator has the ability to control the speed of the vessel by joystick control (forward direction). Only the main thrusters and rudders are used in this mode. In Auto Track mode the vessel moves along pre-configured tracks. Special modes are available for cable and pipe laying vessels and dredgers.
• Target Follow: This mode enables the vessel to automatically follow a moving target and keeps the vessel at a constant position relative to the target (Hold Position to target). This mode is e.g. used for ROV follow.
• Simulation Trainer Mode: Simulation mode can only be entered when the thrusters are in individual. This mode is used to train the operator in how to use and to get familiar with the Mega-Guard DP system.