Garmin GDL 88H, Rotorcraft Flight Manual Supplement

Page: 5 / 16

Garmin International
1200 E. 151
st
Street Olathe, KS 66062
USA
ROTORCRAFT FLIGHT MANUAL SUPPLEMENT
for STC SR02123SE
GARMIN GDL 84H/88H ADS-B TRANSCEIVER
190-01310-J2 Rev. 1 Page 5 of 16
FAA APPROVED
1.4 Applicable System Software
This RFMS is applicable to the software versions shown in Table 3.
The Main software version is displayed on the External LRU page available on
some interfaced display devices
GDL 84H/88H Software Version
(or later FAA Approved versions for this STC)
3.32
Table 3 - Software Versions
1.5 Pressure Altitude Broadcast Inhibit (PABI)
While operating within airspace requiring ADS-B equipment, per 14 CFR
91.225, Pressure Altitude Broadcast Inhibit shall only be enabled when
requested by Air Traffic Control.
1.6 Traffic Alerting
Traffic alerting is an aid to visual acquisition and may not be used as the sole
basis for rotorcraft maneuvering.
1.7 Rotorcraft with No Heading Source
Rotorcraft which do not have a heading source interfaced to the GDL 88H are
subject to the following limitations:

The traffic page is oriented to rotorcraft TRACK, which may or may
not align with rotorcraft heading.

The traffic display will not show ADS-B traffic when groundspeed is
less than 15 knots. The traffic display will show “UNAVAILABLE”.

If interfaced with a TCAS system the targets from the TCAS system
which are not correlated with ADS-B targets will be displayed at a
bearing on the display that is incorrect by the crab angle of the
rotorcraft (difference between track and heading). When operating
with significant crab angles such as in rearward or sideward flight
above 15 knots the traffic display shall not be used.