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Doc. P/N: WSP-009-005
Version: V1.5
Issue Date: October 2013
www.wassp.com
Page 53 of 73
Installation Manual
10.2.4.2
Option 2: Surface Temperature Correction (NMEA)
If NMEA MTW is being received, this will be shown next to the
Use NMEA MTW
option.
Set the screen display (user interface) to
Sonar
view.
In
Ship Setup Options,
in the
Sound Speed
tab, set the sound speed computation
method to
Manual Entry
or
Use NMEA MTW
.
Find a section of seafloor that is known to be flat, preferably 20-100m deep.
Cross over the section of seafloor and adjust the
Temperature Offset
until the seafloor
curve has been removed.
1
2
3
4
Use NMEA MTW
Figure 48. Ship Setup Sound Options - Surface Temperature Correction