Kadena AFB in Okinawa is right on the Pacific ocean and the salt air simply ages air frames faster.
You really don't want to base a late 30 to 40 something year old airframes in a base laden with salt water air
The accelerated corrosion from salt air causes airframe cracking 3/
....which is one of the reasons why carrier planes are built as robustly as they are.
F-15C's _ARE NOT_ carrier planes.
Additionally, the original equipment vendor base for F-15C's is extinct.
4/
There is a small base of specialty vendors that charges huge amounts for buys of 'legacy' air frame parts that take a minimum of a year to provide a replacement part for a lot of reasons including converting 1970's paper & mylar files to CATIA electronic data, tooling set up
5/
...1st article testing approval and intellectual property licencing of down level parts in subassemblies.
The USAF really does need to move its remaining F-15C's to places less prone to salt air aging until there are enough F-35 & NGAD to replace them.
They'll fall apart
6/
...too quickly if they don't.
The other money reasons to go with maintenance is the rotation of a couple of squadrons of F-35 or F-22 every few months through Kadena "spreads the salt air aging" across the 5th Generation fighter fleet.
7/
Plus the USAF doesn't have to pay dependent family permanent change of station costs.
Whether this six-month TDY versus permanent basing 'cost savings' actually does so or simply results higher training costs to replace more mid-career fighter pilots & maintainer...
8/
...losses to the airlines I'll leave to others.
The actual costs of military basing is never simple because people aren't as predictable as air frames.
9/9 End.
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...being lowered for 21st century 3rd tier naval powers.
I did an earlier thread on the WW2 US Navy/USAAF/OSS boat-drone. Now I'm going to post a series of still from the point of view of of a boat-drone TV screen for you to compare to that video.
And the more a strongman tries to centralize control. The greater the incentives to that smaller and smaller clique of power to cut off the strongman from reality for their own power agenda's.
2/5
The same thing is happening right now in China to Chairman Xi.
This has fundamentally bad implications for the future Vis-à-vis a Chinese attempt to invade Taiwan.
Rational military power calculations require objective assessments that simply will not happen...
3/5
Multiple sources are reporting that what appears to be a series of Ukrainian boat-drones have struck multiple Russian naval targets in Sevastopol harbor.
Videos of a Russian frigate being stalked by a drone have been released by Ukraine & claims...
Ukraine has one of the densest IADS in the world outside of Moscow Oblast
Nobody has the necessary density of AAA defenses for a $20,000 loitering munition with a 40kg warhead against all the vulnerable fixed targets they can engage within a 1,200km range.