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Address

State/Zip

Dear Ms,Mr. Mrs.XXXXX:

Thank you for your interest in our GNS-530/430 video pilot briefing. The
following is additional information regarding the Wide Area Augmentation
(WAAS) upgrade to the GNS-430/530, and information in the program that
needs clarification, and program instructions. Also, help us reduce the
number of aircraft accidents. Follow and inform your fellow pilots about
the FAASTips safety messages.

**[Wide Area Augmentation System (WAAS) GNS-530/430 upgrade
information]{.underline}:**

I suggest that you download and view the Garmin WAAS training simulator,
and video from the Garmin website. It's an excellent training source on
WAAS. The basic operation of the GNS-530W/430W is the same as for the
GNS-430/530, with special emphasis on the following:

-   The use of the \"OBS\" switch: When on the \"from\" side of the FAF
    during \"Vectors to Final.\" With regard to the \"OBS\" switch,
    refer to the Garmin reference material, (What's New with the
    400W/500W series), page 5, paragraph 7, as well as the other
    functions of the WAAS unit. Note the last caution, "Remember, don't
    press OBS or you will have to **reload the approach, unless you
    desire to sequence to the final approach segment in the active
    flight plan."**

> ![](media/image1.png){width="2.2090277777777776in"
> height="3.3784722222222223in"}

-   The LNAV+V, and LPV approaches. Now vertical guidance available
    during these approaches. Just like an ILS, but with higher minimums.
    (Reference: What's New with the 400W/500W series, page 4, paragraph
    3:

> ![](media/image2.png){width="3.0597222222222222in"
> height="3.972916666666667in"}

-   The ability to parallel your ***[\"enroute\" course]{.underline}***.
    A great function to, for example, circumnavigate weather, to side
    step a parachuting area, or to avoid special use airspace when VFR.
    Parallel track will only parallel the current course segment you are
    flying. You will received a message when parallel tracking will end.
    Per the Pilot Guide, reference page 76.

> ![](media/image3.png){width="2.93125in"
> height="1.7458333333333333in"}![](media/image4.png){width="2.5625in"
> height="1.9166666666666667in"}

**[Additional Information and Clarification]{.underline}**

**[Localizer Back Course Additional Information]{.underline}**

Reference GNS-530/430 the Back Course approach data base message. The
displayed message states to set the inbound course. **[No, always set in
the \"Front Course for the Back Course.\"]{.underline}** If the pilot
sets in the course as directed by the database, the pilot will be
provided \"reverse sensing.\" This information is not contained in the
GNS-530 Pilot Guide. **[Also, auto switching from GPS to VLOC is not
available for LOC Back Course Approaches. The pilot must de-select GPS
to select VLOC. This information is located on page 86 of the Pilot
Guide under \"Points to Remember for Localizer-Based
Approaches.\"]{.underline}** Remember that localizer approaches, as well
as VOR only approaches are not GPS approaches. The ground based signal
is providing course guidance, not GPS. **[However, the missed approaches
for both can be or are based upon GPS waypoints. Therefore, on the
missed approach we state in the video to press/check the CDI switch to
ensure that GPS and not VLOC is indicated, as necessary, and then press
the OBS switch to enable automatic sequencing.]{.underline}**

**[ILS Tolerance Shift Clarification]{.underline}**

I state in the video, when flying an ILS, if the tolerance does not
change from terminal mode to 0.3nm not to continue the approach. **[This
is only true if you use the "Default NAV page's CDI]{.underline}**."
Reference Garmin Pilot Guide, Flying the ILS Approach, page 82,
subparagraph 11. Flying an ILS, as you approach the FAF "\>30nm" will
appear in the lower left corner of the screen indicating a CDI scale
transition from 1.0 to 0.3 nautical miles, full scale deflection.
**Note: This scale transition applies only to the Default NAV Page's [on
screen CDI]{.underline}, since the external CDI or HSI is now coupled to
the VLOC receiver. GPS approach mode will not be activated for precision
approaches, since the VLOC receiver MUST be used for primary
navigation.**

**[V NAV Page Location Correction]{.underline}**

The V NAV page on the Garmin 430 is not under the Aux section but rather
resides on the last chapter of the NAV section.

**[Program Instructions]{.underline}**

Please use the following instructions, and enclosed table of contents to
open and locate the unit you wish to view. Also, please read the
"Notes."

> Insert the CD, then:

1.  Open with Windows Explore

2.  Click on the Unit you want to view.

3.  [Click on index]{.underline}

4.  You can set "Full Screen" on the PowerPoint by right clicking on the
    PowerPoint, and select full screen. To exit full screen, just right
    click again and select exit full screen.

Note: [Only use the index to access the unit you want to
view]{.underline}. The other files on the CD are "single" sound files of
me instructing, or of the slide presentation before our computer
division put the video together with the slides.

Note: Since the production of this program, pilots contacted us
regarding ILS and Localizer Back Course Approaches. The following will
be placed on our web site to alert pilots of the data base message, the
GNS-530 will not automatically switch from "GPS to VLOC," and provide
clarification of the tolerance shift when flying an ILS approach.

If I can be of any further assistance, please contact me.

Regards,

Joseph M. Foresto

FAA Eastern Region FAASTeam Manager

718-553-3235

<Joseph.Foresto@faa.gov>

Enclosure