from past inquiry about Overland, one of the PPruners was kind enough to point out that F/O's were all locals.
This is a common practice in many African countries. Unless it is sophisticated equipment operated by a foreign contractor, expat F/O's have it rough.
Angola imposed Angolan F/O's on SONAD's oil operation supported by Zimex on B1900D.
They have put so much pressure that eventualy local Captains came online and the result i hear, few bent planes out of bad landings and handling....
C