Teledyne Echotrac E20 - NMEA 0183 Format; DESO DDV Formats

SERIAL AND UDP OUTPUT STRING FORMATS
Echotrac E20 Operator's Manual
p. 54 of 60
November 25, 2020
Version 8
Uncontrolled Technology Subject to Restrictions Contained on the Cover Page.
C.5 NMEA 0183 (for depth)
Table 19 applies to the selection of NMEA 0183 DBS with one frequency (high or low) active.
Table 19: NMEA 0183 DBS
Character #
Description
1-7
$SDDBS,
Depth in feet. Single decimal floating point number.
,f,
Depth in meters. Single decimal floating point number.
,M,
Depth in fathoms. Single decimal floating point number.
,F*
8 bit hexadecimal value checksum calculated over the entire string excluding the leading ‘$’
Carriage return
Line feed
Example: $SDDBS,dd.d,f,d.d,M,d.d,F*36<CR><LF>
= $SDDBS,67.915,f,20.701,M,11.319,F*32<CR><LF>
= 67.915 feet, 20.701 meters, 11.319 fathoms
C.6 DESO DDV (for heave, draft, and sound velocity)
Table 20, Table 21, and Table 22 apply to the selection of DESO DDV with one frequency (high or
low) active. With every ping, the following two strings will be generated immediately after the DESO25
output string.
This feature is only available upon request for Deso echosounders.
Table 20: DESO DDV Heave
Character #
Character
Description
1
D
Always D
2
H
Always H
3-4
DD
Heave data
5
.
Period
6-7
DD
Heave data decimal
8
<sp>
Space
9
m
meters
10
CR
Carriage return
11
LF
Line feed
Example: DHDD.DD<sp>m<CR><LF>
= DH-2.00<sp>m<CR><LF>
= Heave, -2.00 meters