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The unit consists of a headset, control console, and receiver.
1. Insert the headset and underwater receiver plugs into the appropriate inputs.
2. Put on the headset and turn the gain control knob to the right in order to turn the unit on and adjust the
volume.
3. Turn the tuning knob to the appropriate frequency of your vehicle’s pinger (e.g. 77 kHz).
4. Listen for your vehicle’s sounding order. For example, if your vehicle’s order is 3-4-3, you will listen for ping-
ping-ping, stop, ping-ping-ping-ping, stop, ping-ping-ping.
5. The hydrophone has a range of approximately 2 km. Slowly rotate the receiver underwater in the area you
suspect the vehicle may be.
6. You can hone in on the signal by listening for the pings to more intense as you point the receiver more
directly towards the pinger.
7. Once you know the vehicle’s general vicinity, attempt to triangulate its position by listening from no
less than three different directions. If possible, after your initial sounding location, listen at 90 degree
intervals from an imaginary circle around the vehicle’s suspected location.
8. Pinpoint the vehicle as closely as possible.
If you have determined that the vehicle is lodged underwater and is not within eyesight, you will need to send
a qualified diver to retrieve the vehicle. If the vehicle is within eyesight, you may attempt to dislodge it from the
obstruction by gently dragging a small anchor or other similar object across the vehicle. If the vehicle has not flooded,
it will rise to the surface when dislodged. If a diver is necessary, pinpoint the vehicle as closely as possible to minimize
dive time.
When you re-obtain the AUV, attempt to determine the cause of the mission failure; if present, examine the error file
for that day’s date. If the vehicle has been damaged beyond standard repair procedure, please contact YSI for assistance.
Do not attempt to “fix” the EcoMapper in any way not covered in this manual. Contact YSI for assistance by
qualified YSI EcoMapper personnel.
NOTE
4.5