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Garmin GTN 625 User Manual

Summary of GTN 625

  • Page 1

    Waas raim/fde prediction program instructions note: the wfde prediction program is part of the garmin trainer and route planning software programs. The required software and instructions are available via the garmin website at www.Garmin.Com. Note: the wfde prediction program requires an internet co...

  • Page 2: 1  Overview

    1 overview the following sections provide an overview of the wfde prediction program and guidelines for when it should be used. Section 1.2 provides a comprehensive set of guidelines for when a wfde prediction is required that is applicable to any installation of a garmin waas enabled unit. Section ...

  • Page 3

    1.2 determining when a wfde prediction is required the wfde prediction program determines whether the gps constellation is robust enough to provide a navigation solution for the specified route of flight. As required (dependent upon type of flight plan, gps software (sw) version, and gps antenna), p...

  • Page 4

    * approved refers to antennas listed in the applicable installation manual (table 2) that allow the garmin waas enabled unit with gps software v3.Xx or later to meet the tso-c145a/c146a or tso-c145c/c146c requirements without requiring the operational limitations specified in the applicable installa...

  • Page 5

    2 identifying gps software version the gps software version used in the garmin waas enabled unit must be determined prior to performing the wfde prediction. The gps sw version may be a factor in determining if a wfde prediction is required. 2.1 gns 400w/500w series products identifying gps software ...

  • Page 6

    Garmin waas fde prediction program instructions 190-00643-01 rev. E 6 wfde prediction program instructions 2.3 g1000 with gia 63w identifying gps software version of a g1000 with a gia 63w : 1) with the g1000 in normal mode, use the fms knob on the mfd to select the aux - system status page (figure ...

  • Page 7

    3 running the fde prediction program trainer and route planning software for waas-certified garmin products include a wfde prediction program to meet the fde requirements for gps as a primary means of navigation for oceanic/remote operations (reference faa ac 20-138a appendix 1). To use the wfde pre...

  • Page 8

    Figure 6 possible update messages 4) the wfde prediction program window appears (figure 7) listing the flight plan waypoints, selected antenna, and the current date/time as the departure time. It is important to verify that the displayed route is correct before proceeding with the prediction. Refere...

  • Page 9

    190-00643-01 rev. E garmin waas fde prediction program instructions 9 wfde prediction program instructions garmin part number applicable product 006-a0154-01 g1000 with gia 63w 006-a0154-02 gns 480/cnx80 006-a0154-03 gns 400w/500w 006-a0154-04 other garmin series 006-a0154-05 gtn 6xx/7xx series tabl...

  • Page 10

    6) to change the departure date, click the down arrow next to the “date (utc)” field. A calendar window appears. Click the left or right arrows to select a different month (if desired), then click the desired date. 7) to change the departure time, click the hours, minutes, or seconds fields next to ...

  • Page 11

    Figure 8 flight setup window 9) to deselect satellites from the setup window, click “de-select satellites,” then clear the box adjacent to any satellite that should not be used in the prediction (figure 9). Waas satellites are not listed in the satellite selection window as raim and fde availability...

  • Page 12

    Figure 10 almanac warning note: to ensure accuracy of results, the almanac data used for the raim and fde predictions must be recent. If the information is out of date, the wfde prediction program will automatically prompt the user to update the almanac data (figure 10). An internet connection is re...

  • Page 13

    This prediction is based on the displayed estimated arrival time ±15 min. Displays the leg of route where outage occurs figure 12 gps/fde availability results screen displays the maximum fde outage only (may be other fde outages) ground speed for outage may differ from entered ground speed, as multi...

  • Page 14

    4 interpreting the fde prediction results the gps/fde availability results screen provides either a “go” or “stop” status for the gps, raim, fde, lnav raim, and lnav/vnav & lpv minima availability. A yellow flag is a possible result for an fde prediction for a non-oceanic prediction (see figure 12)....

  • Page 15

    Suggestions to change the result of a failed flight plan prediction: 1) alter the departure date and time. 2) alter the route of flight. 3) verify any deselected satellites. It is possible that some satellites unavailable for a previous prediction are now available. 4) update the almanac, especially...

  • Page 16

    5 updating/changing almanac and configuration files 5.1 almanac, geo almanac, and configuration files to ensure that each is current, the almanac, geo almanac, and configuration files are automatically checked each time the program is started. If the program finds any of these files to be out of dat...

  • Page 17

    5.2 changing the configuration file the wfde prediction program may be used with several different garmin software programs. Each program uses a specific configuration file to run the wfde prediction program. If the user has multiple garmin programs loaded, the user must verify that the configuratio...

  • Page 18: 6  Printing

    6 printing 6.1 printing the prediction results use of the “print” selection on the “file” menu (in the upper left-hand corner) is not recommended, as the complete results of the prediction are not included on the printout. If a printout is desired, use the following steps. Printing the prediction re...

  • Page 19

    190-00643-01_0e.Indd 19 2/28/2011 1:24:37 pm.

  • Page 20

    © 2011 garmin corporation garmin international, inc. 1200 east 151 st street, olathe, kansas 66062, u.S.A. Tel. 913/397.8200 or 800/800.1020 fax 913/397.8282 garmin at, inc. 2345 turner rd., s.E., salem, oregon 97302, u.S.A. Tel. 503/581.8101 or 800/525.6726 fax. 503/364.2138 garmin (europe) ltd. Li...