What is the first step in manually cleaning out debris from the water jets?

Mooring the boat is crucial as the first step in manually cleaning out debris from the water jets. This action secures the vessel and prevents it from drifting while maintenance is performed, ensuring the safety of the crew and the boat. A securely moored boat allows the engineer to focus on the task at hand without worrying about the boat moving unpredictably or being exposed to hazards in the water.

Following this initial step, it is important to proceed with safety measures, such as securing the primary engine switches and opening the engine cover, but these actions come after establishing a secure working environment. The stability of water levels is also secondary since the mooring itself is what establishes safety before any hands-on cleaning can begin. This initial mooring step is essential for effective and safe maintenance procedures on the water jets.