AIDC Implementation & ObservationSINGAPORE

July 2013

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AIDC Implementation

• Status– AIDC – available for new ATC System– Conduct test with Ho Chi Minh (HCM) – ongoing– Bi-lateral agreement with HCM - ongoing

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Observation: Missing ODF, Option 3 (ODF-3) field

• ODF-3– A field in AFTN message header– Contains reference information of the previously sent data– ICD did not indicate this is a compulsory field

• Compulsory ODF-3 in ACP and REJ– SIN ATMS rejected HCM’s ACP and REJ messages with missing

ODF-3 in HCM messages– Subsequently, HCM ATMS updated software to send ACP and

REJ messages with ODF-3