satellite navigation - jargon buster

Channel

A channel of a GPS receiver consists of the circuitry necessary to receive the signal from a single GPS satellite.

ETA

Estimated Time of Arrival.

Expansion Slot

Slots into which memory cards can be inserted to increase data storage. This is a very useful feature.

Flash Memory

Flash memory is a non-volatile memory device that retains its data even when power is removed.

GPS

Global Positioning System. This is global navigation system based on 24 or more satellites orbiting the earth and providing very precise, worldwide positioning and navigation information 24/7.

GPS Receiver

This is electronic equipment that passively receives a GPS signal for processing. A receiver may be hand-held or mounted in a vehicle.

Li-Ion

Lithium Ion battery a reachargeable type, that offers reliable, long-lasting power between charges.

POI

Points of Interest. Some SatNavs allow you to put in your own POI on your mapped out route.

SatNav

Satellite Navigation System.

Secure Digital

Shortened to SD, this is a memory card about the size of a postage stamp and is very popular. SD cards come in a range of memory capacities now up to 4 gigabytes. This means it can store thousands of images.