TransponderCompatibility (PDF)

Receiving ("see") equipment
Transponder

Transmitting ("be seen")
equipment
Non-Txpdr
Non-FLARM

Mode A Transponder

Mode A/C Transponder

Mode A/C/S Transponder

Mode A/C/S-ES (ADS-B) Transponder
[Includes PilotAware connected to a compatible Mode S-ES
transponder]

Extended Squitter only
(Ping1090/ATT-20B)

FLARM (inc TRX-1500/2000)
(Mainly gliders)

PilotAware
(P3i + optional FLARM)

Varies
Panel mount

PilotAware
£200
Tiny

Zaon MRX
£300
Tiny

TRX-1000
£300
Small

GDL-39
£500
Medium

Traffic protocol

No

FLARM WiFi

None

GDL90 wired

GDL90 BlueTooth

Availability
Distance
Direction
Relative altitude
Proximity alert
Collision alert
Distance
Direction
Relative altitude
Proximity alert
Collision alert
Distance
Direction
Relative altitude
Proximity alert
Collision alert
Distance
Direction
Relative altitude
Proximity alert
Collision alert
Distance
Direction
Relative altitude
Proximity alert
Collision alert
Distance
Direction
Relative altitude
Proximity alert
Collision alert
Distance
Direction
Relative altitude
Proximity alert
Collision alert
Distance
Direction
Relative altitude
Proximity alert
Collision alert

Good

Good

Poor

Unknown

Good

Good

Not detected

Not detected

Not detected

Not detected

Not detected

Not detected

Not detected

Not detected

Cost
Physical size

Not detected

Not detected

Estimated
No
Yes
Yes
No
Estimated
No
Yes
Yes
No

Estimated
No
No
Yes
No
Estimated
No
Yes
Yes
No
Estimated
No
Yes
Yes
No
Estimated
No
Yes
Yes
No

FLARM
£600
Tiny
FLARM wired
(optional WiFi)

ATT-20B
£600
Tiny

TRX-1090
£650
Small

Funke TM250
£900
Panel mount

TRX-1500
£1,000
Medium

Zaon XRX
£1,000
Medium

Ping 1090
£1,200
Microscopic!

TRX-2000
£1,300
Panel mount

GDL90 WiFi

GDL90 wired

Built in display

GDL90 wired

None

GDL90 wired

Built in display

Unknown

Unknown

Unknown

Unknown

Poor

Unknown

Not detected

Not detected

Not detected

Not detected

Not detected

Not detected

Not detected

Not detected

Not detected

Not detected

Not detected

Not detected

Not detected

Not detected

Not detected

Not detected

Not detected

Not detected

Not detected

Not detected

Estimated
No
Yes
Yes
No
Estimated
No
Yes
Yes
No

Estimated
No
Yes
Yes
No
Estimated
No
Yes
Yes
No

Estimated
No
Yes
Yes
No
Estimated
No
Yes
Yes
No

All except no
collision alerting
(proximity only)

All except no
collision alerting
(proximity only)

Not detected

All except no
collision alerting
(proximity only)

All except no
collision alerting
(proximity only)

All except no
collision alerting
(proximity only)

All except no
collision alerting
(proximity only)

Estimated
Estimated
No
Yes
No
Estimated
Estimated
Yes
Yes
No
Estimated
Estimated
Yes
Yes
No
Estimated
Estimated
Yes
Yes
No

PowerFLARM
£1,600
Panel mount
FLARM wired
(optional WiFi)

TAS605
£8,000
Panel mount

TCAS
£15,000
Panel mount

ATC radar
Millions
Ground mount

Wired

Wired

Wired

Unknown

Good

Good

Good

Not detected

Not detected

Not detected

Not detected

Not detected

Not detected

Not detected

Yes
Yes
No
Yes
No

Yes
Yes
No
Yes
No

Not detected

Not detected

All except no
collision alerting
(proximity only)

All

Not detected

Not detected

All except no
collision alerting
(proximity only)

All

All except no
collision alerting
(proximity only)

All except no
collision alerting
(proximity only)

Estimated
No
No
Yes
No
Estimated
No
Yes
Yes
No
Estimated
No
Yes
Yes
No
Estimated
No
Yes
Yes
No

All except no
collision alerting
(proximity only)

All

Primary only
Primary only
No
n/a
n/a
Yes
Yes
No
n/a
n/a
Yes
Yes
Yes
n/a
n/a
Yes
Yes
Yes
n/a
n/a
Yes
Yes
Yes
n/a
n/a

Not detected

All except no
collision alerting
(proximity only)

Not detected

All except no
collision alerting
(proximity only)

Not detected

All except no
collision alerting
(proximity only)

All except no
collision alerting
(proximity only)

Not detected

All except no
collision alerting
(proximity only)

All except no
collision alerting
(proximity only)

All except no
collision alerting
(proximity only)

All except no
collision alerting
(proximity only)

Not detected

All except no
collision alerting
(proximity only)

All except no
collision alerting
(proximity only)

Not detected

Not detected

Not detected

Not detected

Not detected

Optional except no
collision alerting
(proximity only)

Not detected

Not detected

Not detected

All

Not detected

Not detected

All

All

Not detected

Not detected

All

All

Not detected

Not detected

Not detected

Not detected

All except no
collision alerting
(proximity only)

Not detected

Not detected

Not detected

Optional

Not detected

Not detected

Optional

Optional

Not detected

Not detected

Optional

Optional

Not detected

Not detected

Not detected