menu to increase the amount of time between when points are saved, and thus extend the distance covered bya track. Tracks can also be permanently saved to memory, and re-displayedat the user’soption.

Track L ine (TRK): The Track L ine i s the plan ned line of trave l between two waypoints, and it represents the most e fficient path between the two poi nts because it is a straight line. The TRK is measured in degrees (i.e.321°, where 000° is North, 090° East, 180° is South, 270° i s West). See Cross Track Error and Course Over Ground.

Trackplotter: Trackplotter describes a n avigation d evice that sho ws Present Position, along with Track,Waypoint, andRoutes,but NO MAP in the background. See Chartplotter.

Trolling G rid: Trolling Grid is a Hummi nbird® feature th at d isplays a pre cise reference grid around a waypoint. This grid is used as a guide pattern for trolling around a specific area to assure a more efficient and complete coverage of that area. Trolling Grid resolution be changed by zooming in or out on the chart. The Trolling Grid can also be rotated on the display to orient it for optimal boat course for wave and wind conditions.

UTC: UTC is an acronym for Universal TimeConstant. UTC is the “standard time” used in navigation, and is the local time inGreenwich England. (UTC is equivalent to Gre enwich M ean Time (GMT)). T o di splay the cor rect Local Time in a Humminbird® GPS unit, the user must use the Local Time Zone menu and select the time zone (i.e. EST, CST).

WAAS: WAAS is a n acronym for Wide Area A ugmentation System. WAAS is complementary technology to GP S that provides enh anced a ccuracy through correction signals broadcast from FederalAviationAdministration WAAS satellites stationed over the USA. These secondary signals are automatically received bythe standard Humminbird® G PS Recei ver. Wi th WAAS signa l, GPS accuracy i s improved to within 3 meters 95% of the time. Outside the United States, regional governmental coalitions have created similar systems such as EGNOS (Europe) and MSAS (Japan).

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Glossary