What is a crucial step to take to prevent propeller strike accidents while passengers are boarding?

Shutting off the engine before allowing passengers to board is a critical safety measure designed to prevent propeller strike accidents. When the engine is running, the propeller continues to spin, creating a risk of injury to anyone nearby, especially those who may be boarding or disembarking from the boat. Propeller strikes can be severe and even fatal, so ensuring that the engine is off significantly reduces the risk of these accidents.

Additionally, having the engine running can create an atmosphere of confusion and safety hazards, as the noise and vibrations increase the difficulty of communication and awareness of surroundings. Instructing passengers to board while the engine is shut off allows for better oversight, control of the boarding process, and ensures that everyone remains safe as they enter or exit the boat.