What is an important step to avoid propeller strike accidents?

Turning off the engine when passengers are boarding is crucial for preventing propeller strike accidents. A propeller can spin at high speeds and, if the engine is running while individuals are getting on or off the boat, there is a significant risk that someone could inadvertently fall into the water or come into contact with the spinning propeller. This contact can lead to severe injuries or even fatalities, making safety during boarding and disembarking a top priority. By ensuring the engine is off, boat operators create a safer environment for passengers.

While having all passengers sit down, keeping the engine idling, and lowering the anchor may have their respective safety reasons, they do not directly address the specific danger posed by a spinning propeller during the critical time when passengers are accessing the boat. Thus, turning off the engine is the most effective preventive measure in this context.