20
FEET OF TOW ROPE
5'
10'
15'
20'
25'
FISH
DEPTH
50'
100'
150'
200'
250'
300'
1-2 MPH
4. Use buoys - For laying out a grid pattern for searching and for marking readings. When you get
a reading, drop a buoy immediately and a second one about 50' later. This gives you alignment
for finding the exact spot should you have problems on the next pass. The buoys are a must if you
are looking for a small object (cannon).
TOWING: Uncoil the rope on deck and lower the Fish overboard, towing 1-2 MPH. Slowly let out rope the
desired amount and tie off. DO NOT MAKE SHARP BENDS IN THE ROPE. Do not tie rope off on cleat. Do
not coil rope next to motor, or to allow the rope to pass next to the motor; the motor generates a lot of electrical
noise, which can be picked up by the cable and cause the readout to be unstable. At the end of a run, do not
make a sharp turn, but rather a medium turn at increased speed to prevent Fish from sinking to the bottom.
At 2 MPH and 150' of tow rope out, the Fish will be approximately 20' deep.
To retrieve the Fish while towing, slow boat to 1-2 MPH and pull in the Fish. If possible, allow tow cable several
hours on deck (to drain water) before putting it back in the box. Be sure cable connector is protected from the
water at all times (put in plastic bag).
If you are using the UA2 altimeter, be sure the sync cable from the Proton 4 control box is connected to the
back of the UA2. If the UA2 is allowed to free-run it will interfere with the Proton 4 readout (readout jumps
around).
