And why does the procedure get considered by the unit SMS in the first place? The perceived need to save on staffing and money. So the required end result is known before engineering the justification.
Interesting that MATS Pt 1 now specifies that Aerodrome controllers shall maintain as far as practicable, a continuous watch by visual observation on all flight operations on and in the vicinity of an aerodrome as well as vehicles and personnel on the manoeuvring area.
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