The only sentence that contains an adjective used in the superlative form is:
"It is of course, and must remain, the most important aspect, ..." (lines 7-8).
"Having first guaranteed that airspace is less crowded −" (lines 24-25).
"... that the system is able to accommodate more traffic −" (lines 26-27).
" operating hours are tending to become more restricted " (lines 32-33).
"The 'Airports' pages ... will give you a very good general idea " (lines 51-52).
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