BUSS requires the 3 ADR's be physically deselected.
It's basically a recover (land) the aircraft and optimized for the approach mode.
Does the ISIS not have ILS capability with an ISIS FD?
...would this be similar and account for the limited FMA annunciations?
LOC* & GS
arm are what's displayed...
Interesting.....
and weird
edit: I would have sworn lateral and vertical are reversed on the FMA, but beer can create a feeling of more knowledge than one actually possesses.