Aviation is a small world.
An applicant could one day be a manager somewhere.
A standard response is usually sent out to advise they have received your details and will either call you, invite you for interview, or tell you you're being put on file and 'contacted should a suitable position arise sometime in the future'.
Basically they keep your CV incase either their prerequisites change, or one day you've increased your hours, gained types, etc and they can contact you again one day to offer you an opportunity.
Because they havent just ignored your application, you wil see them as a good employer.