🔍 Key Concepts

• Twin pedestal cranes construction and how many cranes are actually involved • What the slew drive system does versus what the turntable is • Typical main motions of a shipboard crane: luff, hoist, slew

💭 Think About

• Think about whether the slew drive is associated with each crane individually, or a common turntable that both cranes share. • Ask yourself if twin pedestal cranes usually allow each crane to operate fully on its own, or if they share some critical motion systems. • Consider whether it makes sense for each crane used for cargo handling to lack any of the three basic motions: luff, hoist, and slew.

✅ Before You Answer

• Verify how many independent cranes there are in a twin pedestal crane setup. • Check whether the slew drive is normally one per crane or one for the entire shared structure. • Confirm that standard pedestal cranes used for cargo work are equipped with all three functions: luff, hoist, and slew, not just some of them.