CN = Non-slewing Mobile Crane (greater than 3 tonnes) C2 = Slewing Mobile Crane (up to 20 tonnes) C6 = Slewing Mobile Cranes (up to 60 tonnes) C1 = Slewing Mobile Cranes (up to 100 tonnes) C0 = Slewing Mobile Cranes (over 100 tonnes) WP = Boom Type Elevating Work Platform HM = Materials Hoist (cantilever platform) HP = Hoist (Personnel and Materials) PB = Concrete Placing Boom BB = Basic Boiler Operation BI = Intermediate Boiler Operation BA = Advanced Boiler Operation TO = Turbine Operation ES = Reciprocating Steam Engine Operation LF = Forklift Trucks LO = Order Picking Forklift Trucks LL = Front End Loader LB = Front End Loader/Backhoe LS = Front End Loader of the Skid Steer Type LE = Excavator LD = Dragline For information on certification of divers, explosive-powered tool operators and powdermen please contact your local WorkCover district office.