West-track disclosure lag — ministerial 10:30, ARCC 22:30, Thai 9–10 days

These statements can coexist: political/military chain knew earlier; civilian SAR centre received formal RMAF information later. They do not by themselves prove concealment from international investigators. Hishammuddin 13 Mar 2014: Malaysia would not ordinarily release raw military-radar data but had shared it with partners including the US and China. Kok Soo Chon 2019: the investigation possessed the complete original radar data; raw military data unpublished because classified. ‘Not released publicly’ is confirmed; ‘withheld from international investigators’ is not supported by those statements. Thai Air Force: Surat Thani painted an unknown/non-normal target ~01:28 MYT, southwest/back toward Malaysia then Butterworth/Malacca; not shared initially because it did not threaten Thai airspace and Malaysia’s early request was not specific. Indonesia 14–19 Mar: Lhokseumawe and Sabang did not detect a crossing; Lhokseumawe ~240 nm; denial of concealment. Negative Indonesian evidence constrains northern-Sumatra routes only after coverage, horizon and thresholds are reconstructed.