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Procedures for Weather Deviations and Other Contingencies in Oceanic Controlled Airspace

JO 7110.65BB, Change 3, effective July 9, 2026 · Official text on faa.gov

Aircraft must request an ATC clearance to deviate. Since aircraft will not fly into adverse meteorological conditions, weather deviation requests should take priority over routine requests. If there is no traffic in the horizontal dimension, ATC must issue clearance to deviate from track; or if there is conflicting traffic in the horizontal dimension, ATC must separate aircraft by establishing vertical separation, then issue clearance to deviate from track. If there is conflicting traffic and ATC is unable to establish required separation, ATC must:

Advise the pilot unable to issue clearance for requested deviation;
Advise the pilot of conflicting traffic; and
Request pilot's intentions.
Phraseology

UNABLE (requested deviation), TRAFFIC IS (call sign, position, altitude, direction), SAY INTENTIONS.
Note
1. The pilot will advise ATC of intentions by the most expeditious means available.
2. In the event that pilot/controller communications cannot be established or a revised ATC clearance is not available, pilots will follow the procedures outlined in the Aeronautical Information Publication (AIP), Section ENR 7.3, Special Procedures for In‐flight Contingencies in Oceanic Airspace; and AC 91-70, Oceanic and Remote Continental Airspace Operations.