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» Garmin GPSMAP 640
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Recent reviews for this item:
boatguy, November 30, 2012
I bought this unit as an option for boat charters where the onboard electronics are limited. I have used it so far on only one trip to Florida and the Bahamas. Pros - used it for an auto GPS in Fort Lauderdale so the "double duty" of sea or land was appreciated. Used it as a mini chartplotter sailing Florida and the Bahamas so provided a neat little navigation when a true boat system was not available. Cons - really not the same as a dedicated chartplotter - small screen, marginal daylight visibility. Overall a good compromise option. Reasonable auto Nav and the ability to have a chartplotter (albeit with some limitations) when a chartplotter is not available. A good product that is compact and easy to use that provides dual options in a compact package and extremely better than the alternate of no electronic Nav options on sea or land The mounts leave much to be desired - look at the Ram mount options
Philo, September 1, 2012
This little unit works as designed for when we head out on the boat. There is a learning curve to to be able to get through the menus without the manual but it comes with time. On our motorcycle it is also good, however, there is one major drawback that has forced us to buy a secondary unit for use. In automotive mode, you cannot save any track data. This is an important feature if you do geocaching, rallys, or want to document your where you have been. If you just going out on a planned trip then it its fine. If you plan any type of long distance exploring, you'll probably need another unit that plots your track.
William, August 6, 2012
So far so good. Need to use more to get a decent assessment of the product.
DrDan, February 4, 2012
I initially bought this unit to serve as a chartplotter for my sailboat. I have the unit mounted on a 4" RAM arm that is bolted to the top of the binnacle. This allows me to rotate the unit very easily to port or starboard so that I can see the unit when holding the wheel from the windward side of the boat. The unit is relatively bright, very sturdy, and has withstood quite a bit of rain and salt water splashing. I wired the mount into my sailboat's instrument system (Nexus NX2 system) via the NMEA network and it works flawlessly, even when repeatedly disconnected and reconnected. More recently, I bought a second mount to use it in auto- mode on my motorcyle. At first I thought it would be too big and heavy but it turns out that a large screen is great on the bike, as it is easy to view in a quick glance (lengthy GPS-viewing is not advisable on a motorcycle!) Overall, very pleased that I didn't have to buy another (expensive) waterproof GPS to use on my motorcyle.




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