
Before you buy a GPS receiver, you need to spend enough time kicking all the proverbial tires. You shouldn't rush out and get a receiver based only on an Internet review without trying that very GPS receiver and see how it works. Try to spend some time comparing as many as models and brands to figure out which one works best for your requirements. Because a GPS unit is sold in many sporting goods stores, electronic stores and bigger retail chains, you should have enough opportunity to try them out.
The three biggest manufacturers of consumer-level GPS receivers in the U.S. are Garmin, Lowrance, and Magellan. All these manufacturers have exhaustive Web sites that provide complete information about their receivers. If you are in the market for those products, definitely spend enough time browsing through the catalog.
Catalogs only provide limited information, you should download the user manual for each model you’re interested in buying. All GPS receiver makers offer free manual in PDF version for their products. If you’re choosing the best GPS receiver, these are great resources for comparing features and performance while seeing what the user interface will look like because the user manuals have screenshots as well as detailed instructions.
Experienced GPS receiver users are also a dependable source of information; if you are out in the wild and a friend is carrying a receiver ask him/her about its strengths and weaknesses and borrow it to familiarize yourself with it. Here are a couple of big questions that you need to ask yourself before you start your GPS receiver hunt:
• What are you going to use the receiver for? Think about what kind of activities you will be doing with it: biking, hiking, fishing, business travel, and so on. What are your requirements? Store secret fishing spots, navigate the narrow paths on the wilderness, or geocaches hunt (hidden stuff from the well-known sport of electronic treasure hunting)? When you can get specific with your requirements, you will know important features that your unit should have.
• Understand your budget constraints. How much cash you’ve got in your purse or wallet is obviously going to affect which models you end up choosing. The more features your GPS receiver has, the more expensive it is. So if you can determine exactly what you are going to use the unit for and also which features you really want, you’ll end up saving a good deal of money. Generally, the figure on your budget should anywhere between $150 to $450 for a fully-featured portable GPS receiver, also note that a few specific aviation and automotive models can cost $1,000 or more.
Mostly, the GPS receiver price doesn't influence accuracy. A high-end GPS receiver isn’t more precise than a more affordable model. The only exception is those that support WAAS (Wide Area Augmentation System), which are more accurate compared with GPS receivers that don’t use enhanced location feature. Determining your budget and your requirements will narrow your options considerably, however you're likely still going to be confronted with many other considerations. These are things you need to consider:
1. Map-based interface: Do you need to view maps and interact with them on your device? If so, you certainly need a GPS receiver equipped with a mapping model.
2. Functions: Will you use the GSP receiver primarily for outdoor recreation or road navigation? Outdoor models should be resistant to shock and water.
3. Accessories: Do you need accessories such as spare cases, vehicle mounting brackets, cables, and upgradeable maps?
4. Battery: Consider these questions:
• How many hours does a GPS unit should run on a fully charged battery?
• Remember these facts: Different models (and their unique features) have different battery consumption, and capacity. Can the battery be replaced by the user? If you are spending more than one night outdoor you should bring at least one fully charged spare battery.
• Is it possible to use a cigarette lighter to charge the unit?
5. Memory: How much memory do you need, is it upgradeable and use a common memory format? This is an important factor if you want to upload and update maps often. Go to the GPS receiver maker site to know how many maps it can take up.
6. Display screen: Consider the following:
• Size: How large is the display and is it easily readable? Make sure to consider visibility in poor weather conditions, in bright sunlight, and at night. The screen size is directly proportional to the GPS receiver size, so if you need a larger, more readable display, expect a larger unit to go with it.
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Color: Is a color screen necessary? A color screen allows easier map reading because colors are often associated with map features.
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User interface: Do you want a device with less steep learning curve? Sure, all devices involve some learning process, but a GPS receiver must be intuitive. Make sure to compare different models and brands because UI are far from standardized.
7. Physical controls: Are the controls and buttons easy to use? Are they easy to operate while wearing mittens or gloves?
8. Weight and size: Is it possible to get the smallest weight and size possible? Note that there is only less than 8-ounce weight difference between the heaviest and lightest handheld GPS units.
9. Connectivity: Do you plan to connect the unit to a computer to upload and download data? If so, check to see if the receiver can interface easily with your computer to exchange data, especially if you are using a Mac or Linux; it is necessary if you want to update the GPS receiver’s firmware.