Evaluation:  
Conclusion: Not Getting Lost In My Backyard! Or on the Back Roads.
Review: Just using the electronic moving compass feature helped plot out the boundaries of my lot of land. When I found all the corners, the Lat&Long feature let me place marker post for a fence. It would be good/better if the altitude feature was more accurate, I could use it to make a topographical map of my land too. The reading I do get are just estimates (+/-40 ft).
While on trips out of town, or out of state, having been to my destination at least once in the past w/ my 310, I can use the ETA feature(Estimate Time of Arrival) for getting there or coming back home.
The 100 landmarks storage memory is well enough for my use. I have added several burger and pizza places to the list for fun.
Evaluation:
Conclusion: Good bargain for connecting to laptop computer
Review: The Magellan 310 is an old, discontinued GPS receiver. I bought the Magellan 310 at $30 at a local chain department store. As I suspected, the unit displays the coordinates in only 4 digits of "minutes" (A.K.A. DD MM.MM format). Modern GPS receivers display 5 digits of minutes. Unfortunately this means the Magellan 310 can only display coordinates to within +/- 60 feet in each dimension (North/South and East/West).
When I hooked the Magellan 310 to a laptop computer with a serial cable, the 310 outputs up to 6 digits of Minutes - more than sufficient for any task. So if you're looking for a bargain priced GPS receiver for use with a laptop for something like NetStumbler or DeLorme Street Atlas, I think this is a good bargain if you can find it under $50. Be sure to budget for extra cost of a serial cable (about $20) as the cable is not included.
Unfortunately, you can't transfer saved waypoints between your computer and the 310 with the serial cable.
I also think this GPS receiver is perfectly suitable for situations where high precision isn't required. For example, finding your way back to your car after hiking in the woods doesn't really require 3 Meter precision like modern GPS receivers have - the Magellan 310 should get you within 20 Meters (about 65 feet). That should get you close enough to see your car.
One of the most popular reasons for buying a GPS receiver is for geocaching. Most people that want to try out geocaching look for a low-priced GPS receiver so they can try the sport and decide whether or not they like it. While it might be tempting to buy the Magellan 310, I strongly suggest spending a few more dollars on a GPS receiver with 5 digit minute precision like the Magellan 315 or the Magellan Sportrak. It is technically possible to geocache with the Magellan 310, but you'll have to manually adjust for the 4 digit minute precision. Explaining how this adjustment works is beyond the scope of this review, but trust me when I say you want something better than the Magellan 310 for geocaching.
Evaluation:
Conclusion: Great, basic GPS
Review: If you want a GPS that will tell you where to turn left to get on the Turnpike, this isn't it. But if you want to know exactly where you are on the planet, the Magellan 310 and 315 do an excellent job of it, with full 12-channel satellite tracking, the highest available. The nobs are complicated at first, but most guys like learning that sort of thing. This is basically the perfect gift for geeky dads or hikers.
BTW, the screen on the 310 and 315 as well as the features are superior to the eTrex basic model, although that model is far more ergonomic.
Evaluation:
Conclusion: Get The Magellan 315 - for a few dollars more - Worth it!
Review: I had purchased a 310 and a 315 because they run out of the Magellan 315. What a difference! To start the batteries do not run out that often, the 315 is more accurate somehow, dont ask me why; just comapring side by side the 310 even though a bit smaller seems less "in the Game"
I gave my 310 to my son, its a godd starter GPS, if you are serious about GPS handhelds, get the Magellan 315 for a few dollars more. Worth every penny!
Evaluation:
Conclusion: easy to use gps with all the features you need
Review: third gps I have owned,the only thing I dont care for is naming waypoints with a 4 digit limit.Unit locks onto sats.faster than any i have owned,easy to use and enter waypoints.other than digit limits I would have given it 5 stars.better than etrex
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