Which action may be more practical than course changes for achieving proper helicopter spacing?

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Controlling how quickly you close or open the gap on the same flight path is the most practical way to maintain proper helicopter spacing. Adjusting speed lets you fine-tune the distance to the aircraft ahead without changing where you’re flying, so you stay in the same lane and keep the overall flow stable. It’s faster to implement, easier to monitor, and less disruptive to navigation and coordination than altering altitude or course.

Altitude changes can introduce terrain or airspace constraints and new conflict risks with other traffic. Holding patterns take more time, consume extra airspace, and are not as flexible for real-time spacing adjustments. Engine power changes can affect performance and stability in ways that aren’t as predictable for maintaining consistent separation.

So, using speed adjustments directly controls the spacing on the current path, making it the best choice.