Have you tried looking at the instrument approach procedures into CHS before coming up with this stuff?
https://skyvector.com/files/tpp/1507/pdf/00076IL15.PDF
The Army is in no position to go throwing stones after the raw deal we are giving the 58 community....
I look at both pictures and just thank god I didn't go scouts on selection day. What we are doing to our own people with this rack stack secret OML nobody is allowed to talk about, and holding dudes in purgatory over follow on assignments while they fly their aircraft out to Davis-Montham and do rotations through Korea ... Absolutely disgusting.
I'm sorry but ATC better have a damn good reason for having him this low at 20NM out, especially given that MSA is 3100ft. 1600 MSL is glideslope intercept altitude for R-15. That happens at 5.8 DME. Anyway, enough said. It will all come out in a few months. Just sucks 2 lives were lost and one ruined.