Minimum Aviation System Performance Standards for Aircraft ...

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Table 3.1.1.3.2a: Subsystem Classes and Their Features
Class Subsystem Description Features Comments
Interactive Aircraft/Vehicle Participant Subsystems (Class A)
A0 Minimum Supports basic enhanced Lower transmit power and less Minimum interactive capability
Interactive visual acquisition sensitive receive than Class A1
with CDTI.
Aircraft/Vehicle
permitted.
A1 Basic
Interactive
Aircraft
A2 Enhanced
Interactive
Aircraft
A3 Extended
Interactive
Aircraft
B0 Aircraft
Broadcast only
B1 Aircraft
Broadcast only
B2 Ground vehicle
Broadcast only
A0 plus provides standard
range
Standard transmit and receive Provides standard range
A1 plus improved range Standard transmit power and
more sensitive receive.
Interface with avionics source
required for TS.
A2 plus long range Higher transmit power and
more sensitive receive.
Interface with avionics source
required for TS
Broadcast-Only Participant Subsystems (Class B)
Supports A0 Applications
for other participants
Supports A1 Applications
for other participants
Supports airport surface
situational awareness
B3 Fixed obstacle Supports visual
acquisition and airborne
conflict management
C1 ATS En route
and Terminal
Area
Operations
C2 ATS Parallel
Runway and
Surface
Operation
Supports ATS
cooperative surveillance
Supports ATS
cooperative surveillance
Transmit power may be
matched to coverage needs.
Transmit power may be
matched to coverage needs.
Transmit power matched to
surface coverage needs. High
accuracy position input
required.
Fixed coordinates. No position
input required. Collocation
with obstacle not required with
appropriate broadcast coverage.
Ground Receive Subsystems (Class C)
Requires ATS certification and
interface to ATS sensor fusion
system.
Requires ATS certification and
interface to ATS sensor fusion
system.
Supports longer range applications
Extends range for advanced
applications.
Enables aircraft to be seen by
Class A and Class C users.
Enables aircraft to be seen by
Class A and Class C users.
Enables vehicle to be seen by
Class A and Class C users.
Enables NAV hazard to be
detected by Class A users.
Supports provision of ATS
Surveillance for ADS-B System
Participants where adequate Air-
Ground range and integrity have
been demonstrated.
Expected en route coverage out to
200 NM. Expected terminal
coverage out to 60 NM.
Expected approach coverage out
to 30 NM, or – if of lesser value -
the point where the aircraft
intercepts the final approach
course. Expected surface
coverage out to 5 NM.