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Author	Topic:   Humminbird Matrix 25 and GPS Interface
AtoZ	posted 07-22-2007 05:00 PM ET (US)         What GPS information will be displayed [by a Humminbird Matrix 25 when the two devices are connected by NMEA serial data interface]?
Chuck Tribolet	posted 07-22-2007 07:52 PM ET (US)             According to the manual at http://www.humminbird.com/images/PDF/Matrix25.pdf . "show position, breadcrumb trail and waypoints on the big, easy-to-read screen, all with big, easy-to-use buttons that handhelds do not offer. In addition, you can store up to 750 waypoints and 10 tracks inside the Matrix unit!" Chuck
AtoZ	posted 07-22-2007 08:33 PM ET (US)             Chuck, I should have mentioned that I have have that manual. I was hoping to find out what the screen looks like. Is it only GPS data or does it still show sonar info. Does it post the GPS speed? I only use the Matrix for depth and speed since I don't (gasp) fish. I'll email Humminbird.. Terry
SpeedBump	posted 07-22-2007 09:06 PM ET (US)             I have the same unit and do use it for finding fish. I interfaced it with my Garmin 76S hand held before I moved up to a [Standard Horizon] 150C GPS. I still have the Garmin interface and will occasionally use it along with the [Standard Horizon] and Garmin. The Matrix 25 interface was a big improvement and had additional features and large viewing area. While it does not reproduce the map of the GPS it does track your course, provide bearings, way points,stores routes, shows speed, voltage, temp, etc., while underway. You can customize it in many different ways. My biggest [problem] was remembering to change the GPS output to the proper NEMA setting. Electrical connections were a breeze also.
AtoZ	posted 07-22-2007 09:27 PM ET (US)             Was [the Hummingbird Matrix 25] showing GPS speed or paddle wheel speed?
jimh	posted 07-22-2007 09:41 PM ET (US)             Digital chart cartography cannot be transmitted (in any reasonable fashion) over the slow speed serial data interface which is provided by NMEA-0183 interconnections, so there is no chance that a SONAR could ever display digital cartography contained in a GPS and chartplotter. Devices which are are to share that sort of data need a higher speed connection between them in order to move all the data it takes to draw the screen from one device to a second device for display. These interconnections are usually proprietary and I do not believe there is much success to be had in trying to get different brands to act as displays for each other.
SpeedBump	posted 07-24-2007 08:36 PM ET (US)             The speed is by GPS.
gss036	posted 07-24-2007 09:40 PM ET (US)             I currently use a Matrix 17 as both a GPS and depth sounder for fishing. It shows a plotter screen only with marks for the locations. If you want [your MATRIX to show [digital cartography or] charts you will need [digital cartography software] for that, which is compatible with the MATRIX 25. My Matrix 17 is not [able to use digital chart cartography].. I also use a Garmin GPS with BlueChart and also an old Loran and depth sounder combination. It only shows a plotter screen.
SpeedBump	posted 07-25-2007 06:50 PM ET (US)             you can always upgrade your matrix 25 with GPS, barometer and a few other goodie that escape me. I believe that by the time you add all the bells and whistles you could probably buy a new GPS / FF combo.

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