approach visibility

approach visibility

[ə′prōch ‚viz·ə′bil·əd·ē]
(navigation)
The distance from which a pilot on the instrument approach glide path can see landing aids at the runway threshold. Also known as slant visibility.
References in periodicals archive ?
If the 34:1 surface is penetrated, approach visibility is limited to no lower than 3/4 statute mile.