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To replace the battery, place a new battery of similar specifications into the battery compartment
and secure it with the Velcro strap and re-connect the positive and negative terminals.
SETTING THE TRANSDUCER FOR ICE FISHING
When used in conjunction with the retractable pivoting transducer arm and rubber stopper, the
Digital Sonar’s transducer will automatically level itself in your ice hole. To begin operation, take
the transducer out of the recessed holder, and rotate the adjustable ice arm out from inside the
shuttle. Extend the transducer arm, (the cable should already be threaded through it with stopper
in place) and deploy the transducer into the water. We recommend setting your stopper to have
the transducer down the least amount possible. The MarCum Digital Sonar puts out enough
power that in most cases it is not necessary to have your transducer down more than a few
inches below the water line to get a good reading. When the ice thickness is over two feet, it
may be necessary to have your transducer set somewhat farther down.
Remember--the less transducer cable you have out, the easier it is to pull it out of the water
when bringing in a fish, or to move to a new location. Under no circumstances should you ever
have the transducer below the ice—this can lead to the transducer becoming damaged.
It is also important that you keep the cable near the center of the ice hole. We frequently hear
from anglers who allowed their cable to freeze into the side of the ice hole. If this should happen
to you, make sure the unit is turned off before attempting to chisel it out. If you accidentally cut
the transducer cable, do not try to use that transducer again.
MOVING THE TRANSDUCER TO A NEW LOCATION
Being mobile is one of the keys to being successful on the ice. Whenever you move from one
spot to another, it is tempting to leave your transducer hanging on the transducer arm. This is
likely to lead to failure of the transducer arm, and can cause damage to the transducer itself.
Always stow the transducer inside the pack when you are moving. Keeping the amount of
transducer cord you have out at a minimum will make transporting your Digital Sonar easier.
Similarly, you may need to quickly remove your transducer from the hole when about to land a
fish. We have seen anglers in a panic grab the shuttle itself and toss the entire unit to the side.
This is no way to treat any piece of electronics; a much better approach is to simply lift the
transducer out of your way by the cord, and the shuttle itself can be gently pushed aside.
Whenever you are moving via sled or vehicle, always fold up your transducer arm, stow the
transducer inside, and close the protective soft pack.
READING THROUGH ICE
The MarCum Digital Sonar will provide accurate information reading through ice providing the
ice is reasonably clear. Wet the ice with at least a cup of water to improve the coupling of the
transducer to the ice. Place the face of the transducer firmly on the wet ice, and you will now be
able to see the depth displayed digitally, and a signal showing the bottom (and fish) on whichev-
er sonar windows you have open. Drilling into the ice 1-2” before taking a reading may be
necessary if the surface of the ice is very rough, or if the ice is filled with air bubbles.
OPERATION
The MarCum Digital Sonar has many functions and settings that are selected or changed by
buttons on the Control Panel. Learning what each of the buttons (POWER, SENS, RANGE,
ZOOM, IR, CONE ANGLE, TARGET ADJUST, MENU/ENTER, UP, DOWN) does will enable you
to get the most out of your Digital Sonar. Note that you can experiment with different settings
and dashboard arrangements in SIMULATOR mode. Many of the selections will activate just by
highlighting your desired setting.
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