Summary: I bought this for my brother who is an avid wild life photographer and he loves it so much and tracks all this waypoints. He's so excited and lauds how much its useful for this profession.

Summary: Ideal for boater, or hiker. this unit keeps you updated every second It usually tracks 6 to 8 satellite a time for accuracies of 50 feet or less. With the WAAS turned on and you are near an airport with WAAS Signal you can expect accuracies of 25 feet or less. Unit has plug for external power. Unit has a plug for external antenna Unit has a USB plug for computer interface The unit is waterproof and runs on two AA Alkaline for 24 hours of normal use. Waypoints can be named and routes are programable. Well written instruction book explains the various ways to use this fine instrument. Lots of features for small money. Recommended for boater Camper or flyer on a budget. Dave KB2FB