I use the Nuvi 200 to geocache with. Although I am a new cacher as well, but so far I have found it to work very well even in a side by side comparison with a co-worker who caches with a Garmin eTrex Legend HCx.
Sometime I will post a full review/instructions on how I use the Nuvi 200 for geocaching. IMO it is underrated, a lot of people assume it is a bad unit and don't give it a fair try. Certainly it doesn't have the bells and whistles some of the handhelds do, but it works pretty well IMO. I will give a brief overview:
No wrist strap
No built in compass
Does not show real-time cordinates
Does not show detailed satellite screen (only a cell-phone like bars indicating general signal strength)
No "tracks" to show your course.
Might have more difficulty getting signals in forests or heavily wooded areas than some handhelds (no forests where I live, but in heavily wooded parks I have not had problems so far with mine, but in theory there are models with better antennas)
5 hour battery (realistically probably 3-4 hours, as you will want the screen to be bright)
Obviously can double a car routing GPS, which means you don't have to buy two GPS, one can do it all.
Is very inexpensive, and comes with city maps pre-installed (NOTE: if you want topo maps they must be bought separately)
It has very good accuracy, same accuracy as my friend's eTrex Legend HCx.
Nice big, bright screen
Easy to use
Bottom Line: It can geocache, and works pretty well. The goal is to get to some listed cordinates, and the nuvi 200 is certainly capable of doing that.
Obviously you need to be in "pedestrian" and "off-road" modes to geocache. Also zoom all the way in when you are close.
Bring a handheld compass, and set your display so "north is up".
Ignore the cordinates really. Just walk the direction you see the destination point is, until the GPS reads you are within 5 feet, then you are there. Ignore the "Arrived at Destination" sound and box the GPS pops up. That is still 100 feet away. Look only at the number of feet you are away, and direction it is from you.
Download new icons. The pre-install icons are 1) too big 2) show your position in the center of the icon, even the arrow you are not at the tip, but in the middle of it. There are 3rd party icons available to install where you can be at the "tip" of the arrow, or a cross hairs showing exactly where you are at.
If there is any chance of rain, or wetness, put the GPS unit in a clear ziplock baggie.
If you are concerned about dropping it, you can secure it to your wrist via large rubber bands.
Set a "car" point in the parking lot to help find your way back to the car, since this model does not show your "trail" to follow back on.
Be aware of your limited battery life. Dim the screen or turn it off when traveling long distances between caches. Plug it in to your car if driving between caches. Make sure it is fully charged before long caching trips. It is not that hard to milk that five hours of battery life into a full day of caching.
If you are "regular" member you can either type in the cordinates by hand, or probably use the "send to GPS" option on the computer. Either way they get added into the GPS as favorites.
If you are "premium" member and run a pocket query of the caches, you can use the free POI loader from the garmin website to upload the whole .gpx file into the GPS. Then they will show up under "extras" -> "custom POIs". This is better than them showing up as favorites.
To answer you specific question about the satelite strength, on the nuvi 200 those green bars in the upper left is all you get. The nuvi 3xx series and above has an additional screen that shows the satelites in greater detail, but the 2xx series does not have this. Basically just make sure you are at full green bars when at GZ, if you are not, then the margin of error is greater.
This post has been edited by starscream2: 08 May 2008 - 11:19 AM