Some manufacturers provide ICAO surveillance codes for their respective products:
Garmin ICAO Flight Plan Equipment Codes.
For stratus ESGi (2i or 3i), consider ...
ADS Equipment
For Stratus ESG ADS-B Out with non-certified ADS-B In
receiver (2i or 3i), B1 appears appropriate.
-Remember to lookup the aircraft's Mode S HEX code:
https://registry.faa.gov/aircraftinquiry/NNum_Inquiry.aspx
Enter the HEX code in Garmin Pilot unders Settings > Aircraft > <select aircraft>
-Under 'ICAO Other Information', Code/
<enter your aircraft's 6 alphanumeric HEX code>
Transponder
Product information to determine the ICAO surveillance code should be in the AFM/STC documents.
Stratus AFM describes the ESG as "1090 ES transponder".
REF: Manual/STC documents:
https://stratusbyappareo.com/resources/
Alternatively, check with
manufacturer.
or ...
From this
recent example, scroll down to the
Bonanza A36 example.
Garmin G500 TXi, Garmin GTN650 Nav/Comm/GPS, Appareo Stratus ESG transponder
ICAO Surveillance:
“L” (Mode S Transponder, Enhanced Surveillance, Extended Squitter),
"B1” (ADS-B with dedicated 1090 MHz ADS-B “out” capability)
In GP under Equipment > ICAO Surveillance, select
L and
B1
Hope this helps.