Hi,
Out of Manchester MONTY SID's use airway UN864 and NOKIN deps use airway UN862. These airways both run parallel but many aircraft hardly ever seem to use the MONTY SID out of MAN (going Southwest Bound). What would be the reason for this? And also what would be the reason of keeping the MONTY departure as it is seldom used?
Hope somone can help me out.
BAe 146