Chief Mate / Master AGT

I am using Murphys study guides and amongst the Nav problems are many questions relating to COE River Maps, and it occasionally states LICENSE: Master/ Mate - Rivers.
Does anyone know if this implies that it will not be in the Chief Mate /Master AGT modules (thus saving me purchasing COE maps and the USCP etc)?
(Wishful thinking I am sure!)

MANY THANKS !!