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958 Installation Manual, Rev. A1 Page 43
APPENDIX A: 958 system
technical specifications
TABLE 15: 958 technical specifications
Physical features/environmental Interfacing
Waterproof control head Two bi-directional NMEA I/O ports, 1 AUX port
10.4” diagonal color LCD Two bi-directional RS-232 ports
Unsurpassed sunlight viewability Interfaces to optional Northstar 490 for fishfinding or
to an optional Northstar radar
640x480 pixel, hi-temp, backlit, transmissive color
LCD
Flush mount standard
Waypoint upload/download capability to a PC (with
appropriate software)
High-contrast anti-reflective screen
Waterproof chart cartridge door
One VGA out port (connects to Northstar 1201
monitor and others)
Large, easy-to-use backlit controls One VIDEO in port
Easy interfacing I/O plugs NMEA input sentences: WPL and others
0 degrees Celsius - 55 degrees Celsius max 95%
relative humidity, noncondensing
10 - 36 volts DC power, 50 watts
200 PPNM speed output
Honk output
NMEA output sentences: APB, BOD, BWC, GGA,
GLC, GLL, GSA, GSV, LCD, HSC, MSS, RNN, RMC,
RMA, RMB, VTG, WCV, XTE, ZDA, ZTG. (Conforms
to NMEA v 2.0 and later. Supports 1.5 GLL and
BWC.)
Accepts most external loran receivers
Waypoint and route transfer between two 958’s (or a
957 and a Northstar 941/951/952)