“Altitude checks”
When crossing the FAF to verify aircraft is crossing the FAFat the proper altitude.
“1000 feet, instrument cross checked”
1000 feet above DA/ DDA and instruments are cross checked.
“500 feet, cleared to land”
At 500 ft above DA/DDA and verify that landing clearance was received.
“Approaching minimums”
At 100 ft above DA/DDA.
“Minimums, missed approach”
At minimums.