The new FAQ text is as follows:
Q: Do a unit's abilities continue to function while they are embarked within a TRANSPORT?
A: Yes, within the restrictions specified by the ability itself. Embarked units are Not On The Battlefield (01.02.04), so any ability requiring a visibility or measurement to another unit will fail.
Yarrick’s hero’s of hades hive does require him to be on the battlefield to pick an option, specially decisive command. Decisive command lets the first order Yarrick issues be within 12 and effect all units within 6 if the ordered unit.
The chimera allows officer models to order when they are inside the transport. Thus, Yarrick in the Chimera should be able to use decisiv






