Garmin GPS III Owner's Manual

Also see for GPS III: Declaration of conformity Quick guide Owner's manual Owner's manual

The primary navigation page, the HSI Page, also provides graphic steering guid-ance to your destination. The graphic HSI depicts the desired course to the destinationwaypoint (or the next waypoint in a route), current track, off course error and aTO/FROM indication. The rotating compass card indicates your current track, at thetop of the page. The desired course pointer and CDI indicate the desired course andwhether or not you’re on the desired course. A bug indicator provides course to steer(CTS) information, guiding you back to the desired course should you stray off course.The CDI is indicated by a course deviation scale (across the center of the HSI) anda moving D-bar (course deviation bar). If you move off course, the D-bar will indicatehow far off course you are, based upon its placement along the course deviation scale.To get back on course and center the D-bar, simply steer toward the D-bar. The CDIscale setting is adjustable for 0.25, 1.25 or 5.0 (nautical mile/ statute mile/kilometer).The default setting is 1.25, which represents the distance from the center of the CDIto full left or right limits.To change the CDI scale, use the IN/OUT zoom keys.As you reach your destination, a TO/FROM indicator at the center of the HSI willindicate waypoint passage. Along the right-hand side of the page (top, when displayis vertical) are four user-selectable data fields that display current speed, distance andtime to next waypoint, and vertical speed to target (a vertical navigation function,described on page 43). These data fields may be configured to display different data.This example shows the air-craft heading parallel to thedesired course, with the air-craft right of course morethan 0.5 nm.When off course beyond thelimits of the CDI scale, theD-bar will appear in grayand stay at the edge of thescale (until your off courseerror is less than the limits ofthe scale).40REFERENCEHSI Page Desired CoursePointerD-bar(part of CDI)Compass Card(Track)TO/FROMIndicatorCDI Scale SettingBug Indicator