05-14-2013, 10:48 AM
Yes, it is different.
My logic was that even though I set the profile to fit our coach and stacker trailer specs, I was still depending on Garmin's reports of what the bridges are. Yes, the data could be redundant (not a bad thing) but it could also be more accurate.
If memory serves me correctly there are three sources that all of the GPS tools use. We tried to be redundant and cross check as the new Alpine headset used one, the Garmin trucker used another, and the Rand McNally used the third. I also seem to recall the Garmin source was better...military based, more sats in the sky? I would have to check my data as I have slept since then.
I don't remember which ones the low clearances used but I think they did some double checking?
My logic was that even though I set the profile to fit our coach and stacker trailer specs, I was still depending on Garmin's reports of what the bridges are. Yes, the data could be redundant (not a bad thing) but it could also be more accurate.
If memory serves me correctly there are three sources that all of the GPS tools use. We tried to be redundant and cross check as the new Alpine headset used one, the Garmin trucker used another, and the Rand McNally used the third. I also seem to recall the Garmin source was better...military based, more sats in the sky? I would have to check my data as I have slept since then.
I don't remember which ones the low clearances used but I think they did some double checking?