What is a feature of the SD-2 Spotting Dolly?

The SD-2 Spotting Dolly is designed with the capability for each driven wheel to rotate independently. This feature provides significant maneuverability, allowing operators to navigate tight spaces and make precise adjustments during operations. The independent rotation of the wheels enhances control over the dolly, enabling it to move in multiple directions rather than being restricted to just straight lines. This flexibility is crucial in various settings, particularly in areas where space is limited or where precision is essential for moving loads safely and effectively.

In contrast, the other options lack the benefits provided by this feature. For instance, having motion restricted to straight lines or lacking lifting capacity would limit the dolly's utility in handling diverse operational tasks. Additionally, while being powered by a four-cylinder diesel engine might imply robustness, it doesn't directly contribute to the critical functionality that the independent wheel rotation does, which is vital for effective dolly maneuverability.