While both are decision altitudes
, at some point during an approach, we decide to continue the approach to the runway and land or declare a missed approach.
'Nabanggit ko kasi dati, I've been receiving complaints that 'yung Cypress Tower along C-5 is almost at the flight path of incoming aircraftIs it one of the factors, the Cypress Tower, in [increasing] the minimum decision altitude
(MDA) na dating 300 (feet), naging 900 (feet)?
What likely will happen when it reaches decision altitude
on the approach you're about to fly?
The ILS decision altitude
occurs closer to the runway.
As he was about to his decision altitude
, his wife cried out in desperation, "What the f ...
Minimums are published as a decision altitude
The straight-in ILS calls for a decision altitude
of 6765 feet at 1.7 DME from GCN, a half mile from the threshold.
The commonly accepted definition has been something like "the aircraft flies over an initial approach fix (IAF) and departs the final approach fix (FAF) inbound to the airport in actual or simulated IMC and breaks out somewhere before reaching the missed approach point (MAP), decision height (DH) or decision altitude
(DA)." It's not all that simple, of course, especially once simulators and view-limiting devices get involved.
I'll continue the descent to the decision altitude
of eight hundred and sixty feet which is two hundred feet above the runway.
Looking closely at the overhead view, you'll see why: a tower topping at 1621 ms1 (100 feet above decision altitude
) just northeast of the airport, and another tower with a top at 1844 (323 feet above DA) a mile or so beyond.
Additionally, adding a stabilized decision altitude
to each approach will ensure all is going according to plan.