posted 06-12-2015 01:38 PM ET (US)
SIMRAD's New GO7 chart plotter and SONARThe small boat electronics market is a prime target for combination GNSS receiver, chart plotter, and SONAR devices with a multi-function display screen size of about 7-inches. A new choice in this market segment is the SIMRAD GO7. The SIMRAD GO7 is a color, touch-screen display with multi-touch sensitivity, permitting user actions like pinch-to-zoom. There are no conventional buttons or controls on the device, other than an ON-OFF button.
The SIMRAD GO7 multi-function display, SONAR, chart plotter
The GO7 has an internal GNSS receiver. As best I can tell from the specifications, the receiver only works with the GPS L1 C/A signal. SIMRAD goes to great lengths to let everyone know that the receiver can deliver a new position solution at a rate of 10-Hz, but they keep quiet about the capability to use high precision augmentation systems or other GNSS constellations. There seems to be an obsession with GNSS receiver update rate, and boaters tend to think 10-Hz is something special. This is actually not very fast as modern GNSS receivers are now providing position solution rate as high as 50-Hz. I don't understand the need to have a 10-Hz position solution, unless moving along at more than 50-MPH. Even at 50-MPH, a 1-Hz position solution gives you a position every 73-feet. A 10-Hz update would give a position every 7-feet. I don't really see much advantage, particularly at more modest speeds.
The multi-function display (MFD) of the GO7 is a 7-inch diagonal color LCD display with an LED backlight that can produce 1,200-NITS, a unit of visible light intensity, equivalent to one candela per square meter. A display with 1,200-NITS is a darn bright display. The display resolution is 800 x 480, or 15:9 aspect ratio.
The chart plotter in the GO7 can use charts in a variety of data formats:
--C-MAP MAX-N
--Navionics
--Insight
--Insight Genesis
--NV Digital
The SONAR included in the GO7 can operate in convention downward looking mode in the usual 50-kHz to 200-kHz range, in what appears to be some form of pulse-compression mode, and in a high-frequency down-scan mode using 400-kHz or higher signals. SIMRAD applies varies names to these functions, such as broadband, chirp-enable, and downscan imaging. The precise capabilities will be greatly affected by the choice of a SONAR transducer, which might cost more than the GO7 itself in some cases.
The GO7 has a NMEA-2000 interface, and the display can show many data parameters received from NMEA-2000 devices, such as an outboard engine with NMEA-2000 output.
The GO7 has its own WiFi that allows it to connect to TCP-IP networks wirelessly. SIMRAD refers to this as their GoFree feature. It may be quite useful in downloading product updaters directly to the device when connected to the internet, and for using tablet devices to access data from or to control the GO7.