Garmin Fishfinder 340C Owner's Manual page 22

I F 340C >
NSTALLING THE ISHFINDER
The Fishfinder 340C can be connected to another piece of NMEA
compatible electronic equipment, such as a Garmin GPS (Global
Positioning System) device. If equipped with a capable transducer,
the Fishfinder 340C can send depth, temperature, and speed
information. It can also mark a location that can be viewed and
possibly saved on another device (see
340C can also accept GPS navigational data, such as position, time,
course, or distance. Refer to the wiring diagrams for interfacing the
Fishfinder 340C with other devices (see
To install the wiring harness to a GPS or other NMEA
device:
1. Follow the voltage source installation steps (see
For Garmin units, the ground (Black) wires serve as data
ground and must be attached together or on the same
terminal. Refer to the wiring diagram of your GPS unit for
wire identification.
2. Connect the Blue (Data OUT) wire from the Fishfinder to the
Data IN wire on the GPS/NMEA harness.
3. Connect the Brown (Data IN) wire from the Fishfinder to the
Data OUT wire on the GPS/NMEA harness.
4. Set the Fishfinder 340C NMEA Input/Output to On
(page 32). For Garmin GPS units, set the communications
interface to NMEA/NMEA, NMEA In/NMEA Out, or NMEA.
16
I W H
NSTALLING THE IRING ARNESS
page 41). The Fishfinder
pages 17 and 19).
page
Interfacing with NMEA
The Fishfinder 340C allows for NMEA 0183, Version 3.01
input/output with a compatible GPS or navigation device. You must
set NMEA Input/Output to On to send or receive data
The following sentences are for NMEA 0183, Version 3.01:
Input—GPBOD, GPBWC (only used if RMB is not present),
GPGGA, GPGLL (only used if GGA not present), GPRMB,
GPRMC, GPXTE (only used if RMB is not present).
Output—SDDBT, SDDPT, SDMTW, SDVHW, SDWPL* (only if
a waypoint is marked in Pointer mode).
15).
*Garmin GPS units accept an SDWPL (WPL) NMEA sentence and create a
waypoint (saved location) at that position
other brands of GPS or NMEA capable navigation devices, check with those
manufacturers to see if their units accept and store NMEA 0183 SDWPL sentences
and waypoints. The Fishfinder 340C does not store the actual waypoint. Only the
receiving device, if capable, stores the waypoint.
You can purchase complete information about National Marine
Electronics Association (NMEA) format and sentences from
NMEA at:
NMEA
Seven Riggs Avenue
Severna Park, MD 21146 USA
www.nmea.org
(page
(page 40). For compatibility with
Fishfinder 340C Owner's Manual
32).