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If a power level is set out of sequence, for example level 5 is set to 40 m, level 6 is 70 m and level 7
is 60 m, then a WASSP information box appears and informs you that a specific power level is invalid
(level 6 in our example). Level 6 can then be set individually to a level below that of level 7 and above
level 5. See Figure 29.
Manual Power
Automatic Power
By Depth
Automatic Power
By Signal
Click OK and reset Power Level 6 to a level
between Power Levels 5 and 7.
If no other power levels have been changed,
clicking "Defaults" will reset the power level.
Absorption Loss: As sound travels through water, some of the energy contained is absorbed
►
by the water, resulting in attenuation of the signal. The chosen value of absorption loss is set at
the time of installation, and is used when calculating backscatter. For the WMB-3230 system, a
default value of 40dB/km is used. For the WMB-5230 system, a default of 25dB/km is used. This
value should not be changed without a clear understanding of the absorption properties of the
water in the area you are working in.
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Figure 29. Ship Setup Power Tab
www.wassp.com
Doc. P/N:
WSP-009-008
Version:
Issue Date:
April 2014
V1.3
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