How are they supposed to know that an ILS approach - a completely routine procedure - is not available? If the problem is them not giving ATC enough warning, what process is there for telling ATC ahead of time? What was SFO going to do if it clouded over, close the airport?
No, land planes at a slower rate (about half) because they can no longer land two planes side by side on the parallel runways. On a day when the weather is known to be cloudy and that is factored in up front, that's not a huge problem.
On a day when the weather is clear and planes are landing at the higher rate, it is a huge problem.
> On a day when the weather is clear and planes are landing at the higher rate, it is a huge problem.
But it can get cloudy any time in SF. So suddenly needing to switch over to ILS operations should be something they're set up to handle pretty routinely.
it's not that the ILS wasn't available, it's that the atis would've said
"VISUAL APPROACH, RUNWAY 28L 28R IN USE"
and the lufthansa crew would say, "huh, we need something different than that". in aviation if you want something non standard, you need to let air traffic know so they can put you in their plan. If you don't tell them different, they're going to plan for you to do what's being advertised.
> What was SFO going to do if it clouded over, close the airport?
then SFO would've advertised the ILS (checks atis) like they're doing right now ...
So they should have, what, called them when they were back over the east coast? Genuine question. They filed the flight plan, they requested the approach they needed when they got there (which again, is a completely routine one that SFO uses every week), it sounds like they were sending all the communication that's expected?
> called them when they were back over the east coast?
depends on who they were on with when they found out SFO was advertising an approach they couldn't take. At the very least they could've told oakland center; that's who they would've been talking to before being transferred to norcal approach, and is probably the one sequencing a good chunk of those other planes coming in.
In aviation, times are almost always estimates, not hard figures. Just like when the captain announces every 15 minutes there will be 15 minutes more delay, the same happens when controllers have other things to do, they route you over a holding pattern until they can deal with you.
And seriously, you don't delay 20-30 flights because one non emergency flight can't do visual approaches at night.