alternate minima question
hi i will soon be starting my instrument rating. will be using jepps and have a question regarding alternate minima which i guess will be answered later on in training but just would like to know now.
when determining whether you need an alternate at a particular aerodrome, say essondon in this case. and just looking at weather, not lighting as i understand there are also conditions there.
it says that atc 303 3.2 one of the conditions is - more than sct below alternate minima.
now when determining which alternate minima to use do you
a, look at airport page for essendon which states the FOR FILING AS ALTERNATE say cat a with actual would be 910'
or
b, look at the approach which gives you the lowest mda / dh and compare with that.
eg. weather at essendon is bkn at 500'. because alternate minima is 910' you need an alternate, or is that 910' the minima if you were using essendon as an alternate.. can someone classify please
thanks