The DTPS system updates on-line his own DTM's (Digital Terrain Model) and Bathymetric maps with help of the IHC Systems dredge monitors such as the Suction Tube Position Monitor (STPM), Dredge Profile Monitor (DPM) and eXcavator Position Monitor (XPM). If a Draught and Loading Monitor (DLM) is installed, it is also possible to use an echosounder to update the electronic maps and dredge depth matrix. Dual depths echosounder (Duel frequency 33/210 kHz) will be compensated for beam pattern, tide, draft, roll and pitch.
Depending on the type of dredge operations a certain amount of visualisation opportunities is availble. The DTM's and Bathymetric views with geographical and local grid co-ordinates can be rotated on-line in the dredge working section The DTM's can be defined from very small to large cell arrays. For cutter and backhoe operations very narrow cell arrays must be defined (25 x 25-cm cell). Auto surging of the depth matrix will be done automatically. Centre map and centre ships are standard features.
In case of bad weather or orther conditions, it is possible that a survey launch for pre-survey will not be available. If this is the case, the dreger operator had always a continuously updated Bathymetric map and Digital Terrain Module available on his screen. If necessary, the DTPS system is able to print on a standard (A3/A4) colour printer a scaled colour map (Bathy or DTM) of the dredge area.
All relevant data is stored continuously in the internal memory. On selected times it is possible to down laod the data into a MO or Zip drive. This recorded data is useful to replay by calamities.
The DTPS systems has a configuration table, which allows the operator to select different actions such as printout on dumping or passing/leaving a certain area. All actions have the possibility to generate printouts, data storage, alarms or to transfer selected data by telemetry to other locations. In some cases a backup DTPS system is running at an office onshore showing on-line a copy of the vessel display.