Narrative:

Due to NOTAM A0XXX/xx for military airspace; dispatch filed us off R465 between cortt and cundu. However; the pre departure clearance looked identical to standard R465 routing; because not all intermediate fixes are listed on the pre departure clearance. Pilots mistakenly interpreted this to be a removal of the non-standard latitude longitude; and contacted both dispatch and honolulu center to verify the removal of [latitude/longitude] from route; and therefore standard routing on R465; cortt to cundu. Both dispatch and honolulu center indicated military space was not hot; and routing was back to normal on R465.immediately after cortt; via cpdlc; oakland center questioned our routing and then instructed us to offset right of course 25 miles between cortt and cundu to avoid military airspace; and we complied. After parking [at destination]; pilots phoned oakland center and discussed the incident. Oakland said they had reviewed it with honolulu center; and they could understand how honolulu misunderstood our verbal requests for route clarification. Thanks to oakland's quick action at cortt; we never entered military airspace.considering the hundreds of lines of information delivered to the cockpit printer every flight; the routing instructions on the pre departure clearance should never be abbreviated. We thought we had clarified the routing ambiguity with dispatch and ATC; but we were wrong. In hindsight; we should have requested a full route read back from ATC at anytime from the receipt of the pre departure clearance until approaching cortt; and recovered from this miscommunication without incident.

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Original NASA ASRS Text

Title: Air carrier First Officer reported erroneous clearance provided to flight crew by Dispatch and ATC was corrected by Oceanic ATC sector.

Narrative: Due to NOTAM A0XXX/XX for military airspace; Dispatch filed us off R465 between CORTT and CUNDU. However; the PDC looked identical to standard R465 routing; because not all intermediate fixes are listed on the PDC. Pilots mistakenly interpreted this to be a removal of the non-standard latitude longitude; and contacted both Dispatch and Honolulu Center to verify the removal of [latitude/longitude] from route; and therefore standard routing on R465; CORTT to CUNDU. Both Dispatch and Honolulu Center indicated military space was not hot; and routing was back to normal on R465.Immediately after CORTT; via CPDLC; Oakland Center questioned our routing and then instructed us to offset right of course 25 miles between CORTT and CUNDU to avoid military airspace; and we complied. After parking [at destination]; pilots phoned Oakland Center and discussed the incident. Oakland said they had reviewed it with Honolulu Center; and they could understand how Honolulu misunderstood our verbal requests for route clarification. Thanks to Oakland's quick action at CORTT; we never entered military airspace.Considering the hundreds of lines of information delivered to the cockpit printer every flight; the routing instructions on the PDC should never be abbreviated. We thought we had clarified the routing ambiguity with Dispatch and ATC; but we were wrong. In hindsight; we should have requested a full route read back from ATC at anytime from the receipt of the PDC until approaching CORTT; and recovered from this miscommunication without incident.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.