Garmin GDL 88 manual Weather, Regular basis, in accordance with the following table

5 WEATHER

The Flight Information Services (FIS-B) function is capable of displaying textual and graphic weather information with GDL 88 installations. No subscription for FIS-B services is required with the GDL 88.

The FIS-B Function is based on a ground-to-air data link and requires that the appropriate ground systems are broadcasting weather data and the aircraft is within reception range of the Ground Broadcast Transceiver (GBT).

The products are transmitted from the UAT (978 MHz) ground stations on a

regular basis, in accordance with the following table:

Weather Product

Expiration

Time

(Minutes)

Transmission Update Interval (Minutes) Interval

(Minutes)

CONUS NEXRAD	60	15	15
Regional NEXRAD	30	2.5	5
AIRMETs	60	5	As Available
			(Typically 20 minutes)
SIGMETs	60	5	As Available (Typically 20
			minutes), then at 15 minute
			intervals for 1 hour
METARs	90	5	1 minute (where available),
			As Available otherwise
			(Typically ≤ 20 minutes)
Winds and	90 or at the	10	12 hours
Temperatures Aloft	end of the
	valid period
Pilot Weather	90	10	As available
Report (PIREP)			(Typically 20 minutes)
(Blue - Regular,
Yellow - Urgent)
TAFs	60	10	8 hours
NOTAMs	60	10	As available
			(Typically 20 minutes)
	Table 5-1 FIS-B Weather Products and Aging
190-01122-03 Rev. A	GDL 88 ADS-B Transceiver Pilot’s Guide			5-1