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Note: In very shallow
water it may help to in-
crease the minimisation
to 5000 as this will sup-
press problems caused
by too much power
which could confuse this
process.
8 metres deep
sloped sea-floor
with pier pole
adjacent to the
transducer.
Almost flat sea-
floor with trans-
ducer numbers
correct and
incorrect.
Very shallow
<1m below
transducer.
Slope getting
deeper off to
port side.
Figure 30 - Sonar View with Transducer Number set to correct and incorrect values.
Page 48 of 68
Installation Manual
Commissioning Step 4: Array Geometry
Depending on the depth in the dock it may be necessary to start the sea-trial
before this test can be completed fully but overt problems should be able to be
seen even with only 1m of water beneath the transducer.
The transducer number should have been entered in the Ship Setup form by this
stage. If this number is unknown for some reason then setting this number to the
right class of transducer will be necessary before meaningful sea-floor mapping
can begin. Currently the classes of transducer are 001 series and 200 series
for 160 kHz systems. If the transducer number is not known set the transducer
number to 1 or 200 depending on which gives the best sea-floor results. Having
the incorrect value will result in a strange mirror effect (see Figure 28).
www.wassp.com
Incorrect trans-
ducer number
sea-floor and
pole very hard
to interpret
With incorrect
number the
flat sea-floor
becomes im-
possibly deep
always follows
Incorrect trans-
ducer number
makes the slope
look like a sea
wall with a ring.
Doc. P/N:
WSP-009-002
Version:
V2.3
Issue Date:
July 2014
makes the
transducer
chasm that
the ship.
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