GARMIN 010-00361-00 Foretrex 201 GPS Receiver

With a user-friendly interface, the rugged Foretrex 201 simplifies navigation, making it ideal for the backcountry or water. Its six dedicated buttons (GoTo, Page, Enter/Mark, Up, Down and Power) make it easy to operate. It offers the most essential navigation data -- enhanced GPS accuracy, extensive storage for waypoints, and reversible routes and tracks -- on an easy-to-read display. Don't worry about packing extra batteries, because the Foretrex 201 runs on an internal lithium battery for 15 hours (typical use). Simply recharge and go.

The Foretrex 201 also comes equipped with special features sure to please mariners and hikers alike. It includes a unique application for sailing and paragliding racers that allows them to configure the start sequence of a race. The countdown is displayed in a large-number format that audibly alerts the user at each phase of the start sequence. With the help of Garmin's exclusive TracBack technology, hikers can mark a campsite, go trekking all day, and follow the electronic "breadcrumb trail" back to camp in time for dinner.

The WAAS difference

100 meters: Accuracy of the original GPS system, which was subject to accuracy degradation under the government-imposed Selective Availability (SA) program. 15 meters: Typical GPS position accuracy without SA. 3-5 meters: Typical differential GPS (DGPS) position accuracy. Less than 3 meters: Typical WAAS position accuracy.

How it Works
WAAS consists of approximately 25 ground reference stations positioned across the United States that monitor GPS satellite data. Two master stations, located on either coast, collect data from the reference stations and create a GPS correction message. This correction accounts for GPS satellite orbit and clock drift plus signal delays caused by the atmosphere and ionosphere. The corrected differential message is then broadcast through one of two geostationary satellites, or satellites with a fixed position over the equator. The information is compatible with the basic GPS signal structure, which means any WAAS-enabled GPS receiver can read the signal.

Who benefits from WAAS?
Currently, WAAS satellite coverage is only available in North America. There are no ground reference stations in South America, so even though GPS users there can receive WAAS, the signal has not been corrected and thus would not improve the accuracy of their unit. For some users in the U.S., the position of the satellites over the equator makes it difficult to receive the signals when trees or mountains obstruct the view of the horizon. WAAS signal reception is ideal for open land and marine applications. WAAS provides extended coverage both inland and offshore compared to the land-based DGPS (differential GPS) system. Another benefit of WAAS is that it does not require additional receiving equipment, while DGPS does.

Product Description
The Foretrex 201 Wrist-Mounted Global Positioning Device is the easy way to get the most from your outdoor activities. This wearable, wrist-mounted navigation tool has the basic GPS capabilities and easy-to-use interface lets you focus on your outdoor fun, without worrying about getting lost! Backlit 100 x 64-pixel monochrome display (36mm x 23mm) Waterproof unit that also operates as a racing timer - perfect for watersports like kayaking, canoeing, boating and sailing Rechargeable battery with 15-hour life Includes Expandable wrist strap, Quick Start Guide & user's manual Dimensions (WxHxD) - 3.3 x 1.7 x. 9 Weight - 2.6 oz