Take-off Alternate
With regards to Take-off alternate,it's said that the requirements for landing minima for a take-off alternate are:
The weather must be above landing minima for the aerodrome at departure time.
My question is:what are these minimas?are they the same the destination whereby in the case of a Cat 2 approach we use Cat 1 minima?or the weather just has to be greater than the minimums written on the plates?Any info is appreciated