Seascape developed an PLC software positioning system to position a vessel or pontoon with a 4 point mooring system. This in combination with a multibeam echosounder system to monitor the pre-, actual and post dredging slope.
The PLC software receives GPS information through DGPS survey software. The Vessels DGPS system is configured with 3 antenna’s for accurate position and heading calculations.
In the DGPS software the operator can draw tracklines. By selecting a trackline the PLC software will follow this (track) runline. The PLC software controls automatically the position of the pontoon, by maintaining the reference point on the selected runline. The value of deviation compared to the active runline is called the cross track error (XTE). Parallel to the runlines, lines are placed at a specified distance starboard and portside as a guide line.