957 INSTALLATION MANUAL, Revision C1 Page 63APPENDIX A:957 systemtechnicalspecificationsTable 14: 957 technical specificationsPhysical features/environmental InterfacingWaterproof control head Two bi-directional NMEA I/O ports, 1 AUX port10.4” diagonal color LCD Two bi-directional RS-232 portsUnsurpassed sunlight viewability Interfaces to optional Northstar 490 for fishfinding640x480 pixel, hi-temp, backlit, transmissive colorLCDFlush mount standardWaypoint upload/download capability to a PC (withappropriate software)High-contrast anti-reflective screenWaterproof chart cartridge doorOne VGA out port (connects to Northstar 1201monitor and others)Large, easy-to-use backlit controls One VIDEO in portEasy interfacing I/O plugs NMEA input sentences: WPL and others0 degrees Celsius - 55 degrees Celsius max 95%relative humidity, noncondensing10 - 36 volts DC power200 PPNM speed outputHonk outputNMEA output sentences: APB, BOD, BWC, GGA,GLC, GLL, GSA, GSV, LCD, HSC, MSS, RNN, RMC,RMA, RMB, VTG, WCV, XTE, ZDA, ZTG. (Conformsto NMEA v 2.0 and later. Supports 1.5 GLL andBWC.)Accepts most external loran receiversWaypoint and route transfer between two 957’s (or a957 and a Northstar 941/951/952)