A hand held GPS system is designed for hiking and outdoor adventures. It is rare to find navigation systems that are made for walking through city streets, because there are mobile phone apps for that. Portable GPS devices are loaded with detailed topographic maps of mountains, hiking trails, bodies of water, parks, and other similar environments. The battery life for the best portable GPS systems can last for up to about 20 hours. Additionally, these gadgets have weather and impact proof designs.
From portable and in-dash navigation systems to marine, handheld and fitness GPS navigation
GPS portable systems can be used for navigation, tracking, search & rescue operations, finding information and optimization of routes. The GPS will also help with finding several venues in a city.
You can review different portable gps systems on the following site: http://www.gpsreview.net/. They have a whole lot of product reviews.
Many car GPS devices have a mode for walking. They're great for navigating new cities. There are also portable GPS devices intended for runners and outdoor hobbyists.
There are several different models of GPS designed for outdoor use such as running or geocaching. The Garmin GPSMAP 60CS Portable Navigator is very useful for this, it has a great battery life and is extremely durable and portable.
Tomtom portable gps systems' price range based on the different models and makes. Currently they range from $69-$149.
You can find portable GPS systems at many online stores. Amazon.com sells many different kinds in all price ranges. Newegg.com is another good place to check out.
Garmins outdoor gps units are made to be outside in the elements. And since they are made to be outside in the elements they are, in fact, very durable.
Personal GPS systems are smaller, portable GPS systems. They still have most of the capabilities of normal GPS devices including location, distance and most of the time a touch screen. There are many personal GPS systems available. http://www.nextag.com/personal-gps/compare-html
The GPS 12 is a portable gps location device that was designed for outdoor use. The GPS 12 is designed for rugged and serious weather conditions making it a preferred choice when hunting or fishing. http://www.amazon.com/Garmin-100014600-2-6-Inch-Portable-Navigator/dp/B00000J40W
There are many different ways and reasons to use your GPS. If you are traveling in a new city you can pull up a GPS on your smartphone, or you can use an external GPS systems, and some cars have GPS systems built in. You just enter your final destination and follow the directions.
A portable GPS system will reach as far as your battery will allow you to go! They do not need to be near a 'mother' connection. They are wireless and work on their own, much like a cell phone.