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Garmin 130 User Manual

Page 89

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Rino

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130 Owner’s Manual

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Map Datum—Offers a selection of nearly all map

datums in common use. Every map is based on a map

datum (a reference model of the earth’s shape) and is

usually listed in the title block of the map. If you are

comparing GPS coordinates to a paper map, chart, or

other reference, the map datum in this field must match

the horizontal map datum used to generate the map or

other reference. The default datum is WGS-84 (World

Geodetic Survey 1984) and should only be changed when

using maps or charts specifying a different datum. If a

map does specify a datum, use the options list to find

datums applicable to the region of the map, selecting the

one that provides the best positioning at a known point.

If necessary, you also may choose the

User datum for

custom designed grids.

NOTE: The User datum is based on a WGS-84-Lo-

cal datum and is an advanced feature for unlisted

or custom datums. To learn more, check your local

library or the Internet for educational materials on

datums and coordinate systems.

Distance/Speed—Choose from three units of measure to

display your rate of travel.
Elevation/Vertical Speed—Choose from two units of

measure to record your elevation and vertical speed.
Pressure—Choose from millibars or Inches to measure

the pressure.

Display Setup Page

You can adjust the amount of time that the backlighting

feature stays on and adjust the screen contrast.
Backlighting Timeout—Choose from Stays On or

delays of 15 seconds, 30 seconds, one minute, or two

minutes before timing out.