Delivery of oceanic clearances via datalink for eastbound transatlantic flights for the Gander Oceanic Control Area (OCA) is available from Gander Oceanic Area Control Centre (OACC) to datalink-equipped aircraft. This service is referred to as Oceanic Clearance Delivery (OCD). The aircraft, including any callsigns, must be registered through the GDC with Gander OACC.
When flight planning, ensure that the phrase ?AGCS? (an acronym for Air to Ground Communication System) is included in item 18 of the filed ICAO flight plan. This remark informs Gander OACC that the flight crew desires to receive the oceanic clearance via datalink.
Gander OACC sends the clearance to the GDC 10 to 60 minutes prior to aircraft entry into oceanic airspace. For aircraft in flight, Gander OACC generally sends the clearance by 70° West longitude. For aircraft departing Gander (CYQX), Goose Bay (CYYR), and St. John?s (CYYT) airports, Gander OACC sends the oceanic clearance to the GDC at the same time it sends the departure clearance to the tower. Readback of the oceanic clearance is given to the tower, after which the tower issues the departure clearance.
With automatic position reports enabled, the GDC automatically sends the clearance to the aircraft as a datalink message as soon as it is received from Gander OACC. If automatic position reports are disabled, the flight crew must request the clearance. For detailed instructions to request an oceanic clearance, please refer to the appropriate GDC Services Reference Guide for information specific to each datalink platform. Begin requesting the clearance approaching 70° West longitude, but if the clearance is not received by 25 minutes prior to entry into oceanic airspace, contact Gander OACC on the appropriate voice frequency. If the GDC has received the oceanic clearance from Gander OACC, the clearance is then sent to the aircraft as a datalink message. If the GDC has not received the oceanic clearance from Gander OACC, a datalink message is sent to the aircraft indicating that the oceanic clearance has not been received from Gander OACC and that the oceanic clearance may be requested again in 10 minutes. Multiple oceanic clearance requests may be sent until 25 minutes prior to entry into oceanic airspace. Oceanic clearances are valid for 30 minutes beyond the issue time and voice readback of oceanic clearances is required.
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