Some things can be more limiting than others at different times. They're not all related so sometimes one is more of a problem, other times something else. Various certification rules decide which parameter must be considered most critical depending on circumstance.
Also the limits for some can be either/or/both in terms of upper & and lower speeds, each with different ranges, varying on the day. Ranges can overlap.
Last edited by Tinstaafl; 8th June 2003 at 08:03.