Edgetech 4125 SIDE SCAN, Руководство пользователя

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4125 SIDE SCAN SONAR SYSTEM 0004823_REV_C
4. Click the Bottom Track tab on the Lower Control panel. This tab is shown in Figure 3-9.
Figure 3-9: Bottom Track Tab
5. On the Bottom Track tab make the required settings to track the bottom (check the TrackBottom
and Tracking Indicator boxes) and note the tow vehicle altitude in the Altitude display. Refer to
the DISCOVER software manual for details on setting up bottom tracking.
6. Lower the tow vehicle such that its altitude is 10–15% of the range selection.
7. Increase the survey vessel speed to the desired survey speed and adjust the amount of cable out
such that the altitude of the tow vehicle remains at 10–15% of the range selection.
8. If a pressure sensor is installed, verify that the Pressure display indication is correct.
9. Secure the tow cable to the survey vessel.
10. Begin recording data.
3 3.13 Tow Vehicle Recovery
CAUTION!
The following procedure is only meant as a general guide. Due to varying
condition, exact recovery methods will change and it is up to the end user
to modify their procedure to match the conditions they are working under.
1. To recover the tow vehicle:
2. Click the Towfish Control tab and clear the High Sonar On and Low Sonar On check boxes. This tab
is shown in
Figure 3-5 .
3. Slowly pull in the tow cable until the tow vehicle is just below the surface.
4. Slow the survey vessel speed to under two knots, or, if practical, put the survey vessel in neutral
while the tow vehicle is brought on board.
5. Retrieve the tow vehicle from the water and carefully lower it on deck.