Ive noticed a big difference between minimum approach audios vary from aircraft to aircraft. Some start at 1000 then 500 300 ...200...100..50..40..30...20..10
While another might not start until 300 and skip 200 then go to 100...50...40...30....20..10
Others start the count at 500
My question is Does each airline establish their own minimum countdown? is it Airport specific? or does an A/C type come from the factory with specific hard wired minimums?