User manual GARMIN GNC 300XL TSO

[. . . ] GNC 300XL Pilot's Guide and Reference This manual is written for software version 2. 04 or above, and is not suitable for earlier software versions. © 1999 GARMIN Corporation, 1200 East 151st Street, Olathe, Kansas 66062 USA Tel: 913-397-8200 Fax: 913-397-8282 GARMIN (Europe) LTD, Unit 5, The Quadrangle, Abbey Park, Romsey, Hampshire S051 9AQ, UK Tel: 011-44-1794-519944 Fax: 011-44-1794-519222 GARMIN (Asia) Corp. , 4th Fl. , No. Tel: 011-886-02-2917-3773 Fax: 011-886-02-2917-1758 INTRODUCTION Foreword Web Site Address: www. garmin. com All rights reserved. No part of this manual may be reproduced or transmitted in any form or by any means, electronic or mechanical, including photocopying and recording, for any purpose without the express written permission of GARMIN. GARMIN, GNC 300XL, Spell'N'Find, AutoLocate, PhaseTrac12, GPSCOM and AutoStore are trademarks of GARMIN and may only be used with permission. [. . . ] Calculating closest point of approach. 69 SECTION 5 ROUTE NAV Search & Rescue Operations The GNC 300XL's search-and-rescue function provides navigation guidance for search-and-rescue operations, navigating in a ladder pattern to maximize coverage and efficiency. This is done in reference to two waypoints called `anchor waypoints'. The first leg will be a specified distance from the line connecting the anchor waypoints. The `increment distance' is the distance between each subsequent leg. The ladder can be created on either side of the anchor waypoints. To perform a search-and-rescue operation: 1. Rotate O to highlight the initial offset, and use K and O to enter the initial offset value, and R or L. The map page will show the active leg of the search and rescue pattern as a solid line with the anchor waypoints joined together by a dashed line. 7. Press E three times to accept the operation values and begin navigation. Performing a search-and-rescue operation. After activating a search-and-rescue, you will be informed with an `Offset nav in effect' message each time you traverse the route offset from the anchor waypoints. Note that bearing and distance information are referenced to the anchor waypoints. Once you've arrived at the destination waypoint, the leg increment will be added to your present offset, and the route will be automatically reversed. If a search-and-rescue is interrupted, note the parallel track direction (R or L) and distance on the catalog page for route 0. When you resume search-and-rescue operations, use this as the initial offset. 70 The GNC 300XL's Route RAIM Prediction Function evaluates enroute RAIM availability over the entire route that the pilot intends to fly. Route RAIM Prediction ensures that satellite coverage will be sufficient to meet the protection limits defined by BRNAV/RNP-5 (FAA Advisory Circular 90-96). To use the Route RAIM Prediction Function: 1. From the Route Catalog Page (Figure 1), select the desired route for RAIM prediction (if the route is empty, enter the route first). Highlight the route action field by pressing C twice, rotate K to select `RAIM prd?' and press E. Highlight and enter departure time, departure date, enroute altitude, and enroute ground speed (valid enroute ground speed is "65 nm or greater"). When all parameters are properly entered, move the cursor to the `Compute?' field, and press E. The unit will start to predict the RAIM availability over the entire route, and will switch to `WAIT ->', with the arrow sign continually rotating, indicating that the prediction computation is in progress. If RAIM is available for the entire route `RAIM OK' will appear on the Route RAIM Prediction Page, as shown in Figure 3 (pg. 72). ROUTE NAV Route RAIM Prediction SECTION 5 Figure 1 Figure 2 71 SECTION 5 ROUTE NAV Route RAIM Prediction The time required for RAIM prediction computation depends on the route distance (i. e. , 1000 nautical miles = approximately 2 minutes) and the enroute speed. The longer the route distance and the slower the enroute speed, the longer the time. If RAIM unavailability is detected based on the associated requirement, the prediction process will stop immediately and display `NO RAIM' as shown in Figure 4. `NO RAIM' does not mean RAIM is unavailable for the entire route. [. . . ] The CDI scale will remain at the 0. 3 nm scale from the FAF to the MAP during the active approach. If you are in a missed approach situation, and would like to return the CDI to the 1 nm scale, you may deactivate the approach by releasing the GPS APR switch from the ARM position. Why does my CDI not respond like a VOR when the GPS SEQ switch is set to HOLD?Unlike a VOR, the CDI scale used on GPS equipment is based on the cross-track distance to the desired course, not an angular relationship to the destination. [. . . ]