It all comes from our codification system, every item in the CF inventory has an Equipment Registration Number (ERN), this number is used for everything from manuals to family tree breakout for parts management. Such as 12-138-000.
Therefore we use a sequential numbering system for all items as follows:
11 Instructional equip
12 Aerospace Vehicles
13 Aerospace Accesories
14 Aerospace Engines
15 Aerospace Engine Accesories
30 Land Vehicles (Std Mil Pattern)
The Next group of numbers denotes the specific platform/item:
124 Sea King
138 Twin Otter
139 Jet Ranger
142 Dash 8
156 Harvard II
188 Hornet [Out of Sequence] 118 had been used previously(Iroquois)
The system prior to unification allowed for US numbers F104, T33, F101 etc which was difficult to manage when you had 3 services operating Aircraft, vehicles etc. numbers are selected at the start of the Aquisition process, that is why the Cyclone (Sea King replacement is ahead of the Cormorant).
The last group of numbers designates variants:
000 All models
A00 A model
B00 B model, etc
D00 Dual model (fighters)
MissedApproach do you see the resemblance to the NDID/CFTO system ?
Silly Pilot, Tricks are for kids.......