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SECTION TWO Installing the transducer
Selecting a
transducer
Page 6
CAUTION!
Mounting the transducer requires drilling holes
through the hull; make sure the installation does not
cause the vessel to leak. A thru-hull installation
should be performed by a professional installer. Do
not attempt this unless you are fully qualified.
Do not perform a thru-hull installation of the
transducer when the vessel is actually in the water.
Immediately after installing the transducer, be sure
to check for leaks, and don't leave the vessel in the
water for more than three hours before checking it
again.
Northstar assumes no responsibility for improper
installation of a transducer.
NOTE:
Be sure that the transducer doesn't interfere with
any of the on-board systems. Check all other
systems to ensure that their performance doesn't
degrade when the transducer is connected.
Northstar recommends using an Airmar transducer with the
Northstar's 490 echo sounder.
Table 1: Northstar-recommended transducers
Manufacturer
Airmar
Airmar
Housing
Power
B250
1 kW
(P/N 41-088-1-01)
B744V/B44V (with
600 W
3-wire speed)
490 INSTALLATION MANUAL, Revision B2
Frequency
50/200 kHz
50/200 kHz
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