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2 total sentences available.
For a transatlantic crossing, the Concorde would be assigned a ~15,000-foot block of altitude; it started out at flight level 450 and gradually cruise-climbed up to between FL570 and FL600 over the mid-Atlantic before beginning to descend.
Source: wiktionary
A cruise-climb is more efficient than the standard step climb, but is rarely used since it's much harder for ATC to manage.
Source: wiktionary
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.