Mode C Flashcards
As stated in MATS Part 1, fully describe the methods of identification using SSR and when such methods are to be used. Include any precautions to be taken.
a) Observing the pilots compliance with the instruction to select a discrete four digit code
b) Recognising a validated four digit code previously assigned to an aircraft callsign. When code/callsign conversion procedures are in use and the code/callsign pairing can be confirmed, the callsign displayed in the data block may be used to establish and maintain identity.
c) Observing an IDENT feature when it has been requested.
Caution must be exercised when employing this method because simultaneous requests for SPI transmissions within the same area may result in misidentification. Aircraft displaying the conspicuity code 7000 are not to be identified by this method.
According to MATS Part 1, how are Mode C responses used to apply vertical separation? Include in your answer when Mode C cannot be used to apply vertical separation, but do NOT include the occasions when the intentions of Mode C transponding aircraft are not known.
When SSR is used to assess vertical separation the Mode C responses are to be continually monitored to ensure that the vertical distance is never less than the prescribed minimum.
Vertical separation using Mode C cannot be applied to aircraft transponding A0000.
Minimum vertical separation may be applied between verified Mode C transponding aircraft provided the intentions of both aircraft are known to the controller because either:
a) They are under his control
b) They have been coordinated or
c) They are operating in accordance with established agreements
