Garmin 128 Owner's Manual

Also see for GPS 126: Specifications

Garmin 128 Owner's Manual Manual pdf 53 page image

To change the unit of measure:1. Highlight the ‘units’ field, and press F.2. Select the desired unit of measure, and press F.Speed FilterThe speed filter allows you to determine how theGPS 126/128 responds to changes in track or groundspeed. Three settings are available: automatic, on, oroff. The ‘Auto’ setting is the default and will monitorchanges in your current track and speed and adjust thereceiver’s response time automatically. The ‘On’ settingallows you to manually enter a response time up to300 seconds. Selecting a higher setting may be desir-able in slow-speed applications with frequent changesin track.To enter a value for the speed filter:1. Highlight the ‘SPEED FILTER’ field and press F.2. Select the ‘ON’ option and press F.3. Highlight the “speed value” field and press the Fkey.4. Use U and D to select the desired number ofseconds.5. Press the F key to confirm the selection.Magnetic Heading ReferenceThe GPS 126/128’s heading information can be dis-played referencing magnetic north (automatic or user-defined), true north, or calculated grid headings. Thedefault setting is automatic magnetic north, which issuitable for most applications.To select a heading reference:1. Highlight the ‘heading’ field, and press F.2. Select the desired heading preference, and pressF.To enter a user-defined magnetic heading:. 1. Select ‘User Mag’ and press F.2. Press F, enter the degrees and direction of mag-netic variation, then press F.49REFERENCESpeed Filter andMagneticHeadingTo enter a user-definedmagnetic variation, selectthe ‘User Mag’ option andenter the desired directionand value.The number entered repre-sents a window of time theGPS 126/128 considers inadjusting to changes inspeed and track. For exam-ple, if 12 seconds is entered,the speed displayed willconstantly represent thespeed averaged over the last12 seconds.