Another one question do I have. According to FCOM A320 for 500 feet AGL we should fly 20 seconds from abeam RW threshold to base that is 4 secs for 100 feet, at the same time for visual 1500 feet - 45 seconds, that is 3 secs for 100 feet. How do you calculate base turn if MDA, for example, 1000 feet?