Formats an altitude in feet as a flight level string (e.g. "FL350", "FL085").
The flight level number is the altitude in hundreds of feet, zero-padded to three digits.
Parameters
altitudeFt: number
Altitude in feet (should be a multiple of 100 for standard use).
Formats an altitude in feet as a flight level string (e.g. "FL350", "FL085"). The flight level number is the altitude in hundreds of feet, zero-padded to three digits.