Garmin, Magellan, ... any reception problems on Class C ?

Had an older (cheapo), Tom Tom and just got the Rand McNally 7720, no problems with either under the cabover overhang. :C

No problems with our Garmins, mounted on the engine cover (dog house). Used in the Rockies and north of Edmonton AB.

Beverley&Ken

oregon2 wrote:
Thinking about using Garmin, Magellan, etc. in new motorhome - any problems getting reception with the bed overhang in a Class C ? Instructions on all of these say they need "clear view of the sky".

Drove my Class C Four Winds across country, 2750 miles, this summer and used my Garmin the entire way. Absolutely zero problems.

Aubrey W7OLY

Had our Garmin situated on the dog house of our 2008 Tioga class c when we traveled 12000 miles this past winter and spring. Across country with no problems.

Our Garmin did just fine on our a Fleetwood , mounted on the dash/windshield area.

Most GPS systems will "coast" for a while when they loose satellite reception before notifying the user that they have indeed lost reception. Unfortunately you could be in that lake at the end of the road before the GPS tells you it doesn't really have a clue where the hell you are.

I have a factory installed unit in my Class B that doesn't have any overhang. The GPS antenna is installed under the dash as close to the front of the vehicle as possible and it should have a pretty clear view of the sky at all times. However, I've noticed that in some parts of the country (West Texas down close to the border) when traveling in certain directions and at certain times of the day I get a "lost satellite reception". Indeed, checking the location of the visible satellites at the time and which ones are above the mask angle to the horizon I can see that I don't have enough to get a good fix.

Back when I worked on systems that used GPS for the military one of the pieces of trivia I picked up was that the St. Louis area has the worst US GPS coverage. Many of the early GPS units only accessed the US satellites; newer GPS units and phones use both the US and the Russian satellites. I suspect the Russian satellites give better coverage over the US than the US satellites which were launched to provide the best coverage over Europe. This has to do with the main reason the US and Russia put their satellites up there in the first place. The WAAS feature uses ground stations to assist in locating where you are. So when looking for a new GPS system I think it's a good idea to make sure it uses WAAS and well as GLONAS (the Russian system) if you want the best accuracy you can get. And of course it helps to make sure the antenna is placed where it will have the best overall view of the sky.

am using the Rand 7720 also no problems in the last 2 years and love the features and easy use on a 2008 Fourwinds 5000 30 ft

Just returned from a 7,000 mile trip in our Class C from Florida all the way across the southern and western US; had no problems with our Magellan GPS.

Have the Magellan and love it. No problems over the last year.

We have a Rand McNally 7720 that works great in our class c on the dash. That is a nice unit. I love the screen size and it has all sorts of RV related functions.