
350 Cable Survey System
DPN 402197 © TSS (International) Ltd Page 12 of 32
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Dependent on survey conditions, the lateral offset scale M can be changed between
2m and 15m. Note that the quality envelope will still be at ±2m.
6.2.1.3 Forward Search Screen
The Forward Search screen provides a useful facility for ROV pilots: as described in
7.2, this facility helps the pilot to steer the ROV on a track that intercepts the charted
course of the target cable. It is intended that the heading of the ROV is approximately
perpendicular to the track of the cable.
Used in this way, the 350 System will detect the target ahead of the ROV and will dis-
play an estimate of the forward range between the coil array and the target.
The forward range estimate relies upon information supplied by the coil array and the
altimeter. You cannot access this facility unless the system receives altitude informa-
tion from an altimeter or unless you have configured the software to use a fixed coil
height. See Appendix A for a description of the operating theory behind this function.
Figure 6–4: DeepView - Forward Search Window
Controls and Features of the Forward Search Window
Heading Display
The main part of the screen shows the ROV H, from above, and circles I concentric
with the ROV every 3m, to a maximum radius of 15m. A yellow arrow in the centre of
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