Page 54 of 77
SKIPPER Electronics AS
Edition: 2017-06-12
GDS102 Operation and Installation Manual
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Chapter: 4. Start-up and system Adaption
NMEA Setup
Screen 10 is used for verication of received and control of transmitted NMEA messages. See “Fig. 2.11.
Screen 10. NMEA control screen.” on page 23. Two communication ports (NMEA 0183) are provided:
1. XJ402, RCV1A/B - XMT1A/B
2. XJ402, RCV2A/B - XMT2A/B.
Each port can be programmed individually with respect to the baud rate and scope of transmitted
messages. Before conguring the required channel, it must be selected with soft key NMEA PORT.
Note: The text window will represent information which corresponds to the currently selected port. The
type of displayed messages received from external talker (if connected) or transmitted by the sounder, is
selectable by using soft key DISPLAY. For more easy analysis of the window contents, display can be
prevented from continuous update, if DISPLAY o is selected. The baud rate may be set to 4800 or 9600,
4800 being the more common. Transmitted messages are enabled individually by using a pair of soft
keys, MESSAGE and STATUS. To enable/disable particular message, select it from the list by pressing
MESSAGE button until required message appears on the same button and then select the status of this
message (on/o) by pressing soft key STATUS. It is advisable at this stage to set DISPLAY to “output”
mode, to be able to observe current scope of transmitted messages. Transmitted talker identier is SD,
Sounder Depth.
NMEA transmitted/output messages
Depth & Draught $SDDPT,xxxx.x,xxxx.x,xxxx.x*hh<CR><LF>
Depth below surface $SDDBS,xxxx.x,f,xxxx.x,M,xxx.x,F*hh<CR><LF>
Depth below transducer $SDDBT,xxxx.x,f,xxxx.x,M,xxx.x,F*hh<CR><LF>
Depth below keel $SDDBK,xxxx.x,f,xxxx.x,M,xxx.x,F*hh<CR><LF>
SKP1 SKIPPER DPT message Channel1 $PSKPDPT,x.x,x.x,x.x,xx,1,c-c*hh<CR><LF>
SKP2 SKIPPER DPT message Channel2 $PSKPDPT,x.x,x.x,x.x,xx,2,c-c*hh<CR><LF>
ALR Set alarm state “Shallow alarm” $SDALR,134007.34,230,V,A,Shallow alarm*7B
ALF Alert sentence $SDALF,1,1,0,102103.00,A,A,V,,230,1,<1-99>,0,Shallow alarm,*hh
ALC Cyclic alert list. <every 30 sec. $SDALC,01,01,00,1,,230,,<1-99>*hh
In case of multiple transducers installation the following SKIPPER proprietary sentence can be selected
by enabling format SKP1 and/or SKP2.
$PSKPDPT,x.x,x.x,x.x,xx,xx,c--c*hh<CR><LF>
Checksum.
Transducer location. *
Echo sounder channel number (0-99).**
Bottom echo strength (0-9).
Maximum range scale in use, meters.
Oset from transducer, meters.
Water depth relative to transducer, meters.
* Text string, indicating transducer position: FWD/AFT/PORT/STB. If position is not preset by operator,
empty eld is provided.
** = 1 (for SKP1) or 2 (for SKP2). Note: SKP1 format is presenting information, which is linked to the
echo sounder channel 1, while SKP2 - to operating channel 2. Each of these two formats can be enabled/
disabled individually.
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