Specifications

Tritech International Ltd SeaKing System Options OM
Issue 3 TIL – Eng – Spec – 040 Page 30 of 44
The 2
nd
line is used to set the Gating value that will apply filtering to remove spurious points within
the scan;
Gating = x
Where;
x = Gate Value in millimetres, used to distinguish whether the current profile point is within
+/- 'x' millimetres of the preceding point. This will eliminate spurious points and spikes present
in the profile to achieve a more accurate Mean Seabed calculation.
{Default = 200mm}
Operating Instructions
The Mean Seabed Output will function with a single or dual-head Profiler system. All valid data
points within the Scan Packet will be included in the Mean Calculation. Non-valid data points will
not be included and these include zero values and points outside a boundary determined by the
value of the Gating value entered in the SONV3SO.INI file.
The following features have been included…
▪ Any null (zero) data points within the Scan Packet will not be included in the calculation.
▪ If the current data point exceeds the preceding data point by +/- Gating, this current data point
will not be included in the Mean calculation. This will eliminate any spurious points and spikes
from the Mean Calculation.
▪ In a dual-head operation, if at any time one of the profilers is disabled or is not producing data
then a Mean calculation will still be produced using the data from the functional head.
▪ If there is no valid data points then a zero output will be produced.
Once the 'Mean Seabed' option has been enabled and configured as described earlier, the
operator has "front-end" control of switching on and off Master and Slave head inclusion in the
Mean Seabed Output. This "front end" control is available within the 'Remote' Panel setup and is as
follows;
Step 1:
Click on "Spanner" icon in 'Remote' panel to enter the Setup page…
Step 2:
In the Setup page, the drop-down list at the top left will select between the Master and Slave
Profiler Setup pages…
▪ Master = Profiler Slot 2
▪ Slave = Profiler Slot 3
'Continuous Data Output'
switches Mean Seabed
Output Off/On for both
Master and Slave
Profilers.
Serial Channel Selection for
full 'V4' Profiler Data
output. If used, ensure this
does not match the 'Mean
Seabed' output channel