Due Regard flights
Heard two yesterday. One in Vietnamese airspace and one talking to Singapore on HF. Both American military aircraft. The Vietnamese controller wanted TH130 to go CPDLC for better communication about the pilots statement about making weather deviations but the aircraft was unable. The TH120 mentioned about FL260 and the Singapore controller said that he would work on a clearance for him but the pilot said that he was "Due Regard" and didn't need a clearance.
How exactly does the Due Regard stuff work?