All CF aircraft have a C?### designator: C = Canadian, C/E/F/H/T/U = cargo, electronic warfare, fighter, helicopter, trainer, UAV, then a 3-digit numeric designator.
Our "CH147" Chinooks were Boeing CH-47C"+"s -- the first C-model with an AFCS (automated flight control system) in additional to the SAS (stability augmentation system). Our C+'s were also upgraded with a 28,000lb hook (vice 24,000 hook of the CH-47C), had a 50,000lb MGTOW (vice 46,000lbs of the C) and an ISIS (internal structural integrity system) in the rotor blades. The engines were also upgraded to the Lycoming T55-L-11C from two earlier engines, the T55-L-7C and the T55-L-11A, and provide ~3,900shp and an emergency 10sec rating of ~4,600shp.
I don't really see anything other than CH147A being used as the designator for the next Canadian model of Chinook brought into service.
G2G