The console is complete with 10.4 LCD screen, disk drive and unit function controls. This is not necessary on crossings with valve installation. The signal is received into the One-pass System. The received signal strengths are recorded and processed by the On-board CPU and the resultant data is stored together with DGPS coordinates and water depths. The pipeline s position and all data is displayed on screen as taken, also an icon referencing the position of the boat is shown.
All data collected during the field operation is analyzed.
Utilizing the calibration factors, the data is processed in order to obtain accurate depth of pipe information together with the additional survey data also any other features which need to be included in the final drawings. The results are compiled into DXF format for insertion into the drawing. The nodes derived from the DXF file are used in order to prepare the final drawing together with the other pertinent features. The presentation is prepared in AutoCAD release 13 or 14. The system requires a low frequency electro-magnetic field be applied to a loop created by the pipeline and a cable laid parallel as per fig.1.