What should be confirmed before turning over the main engines?

The confirmation that the stern is clear and the screws are unfouled is crucial before turning over the main engines due to safety and operational concerns. If the area around the stern is not clear, there is a significant risk of causing harm to personnel or damage to the vessel itself when the engines are started. Furthermore, if the screws are fouled, this may lead to mechanical problems or inefficiencies when the engines are engaged, potentially putting the ship in a hazardous situation.

Ensuring clear operations around the propulsion system is a critical safety measure, as it allows for an immediate response if any issues arise when the engines are activated. This practice helps maintain a safe working environment and prevents accidents that can arise from unintended propulsion when the ship is not fully ready or the area is not sufficiently controlled.