When transitioning from an offshore airspace area to oceanic airspace, an aircraft may climb through opposite direction oceanic traffic provided vertical separation above that traffic is established:
Before the outbound crosses the offshore/ oceanic boundary; and
15 minutes before the aircraft are estimated to pass. (See FIG 8-5-2.)
FIG 8-5-2 Transitioning From Offshore to Oceanic Airspace Opposite Direction
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