Complex sentence: A passage plan can be summarized as a comprehensive, step by step description of how the voyage is to proceed from berth to berth, including undocking, departure, the enroute portion of a voyage, approach, and mooring at the destination.
Split into simpler sentences: A passage plan is a comprehensive, step by step description of how the voyage is to proceed from berth to berth. The plan includes undocking, departure, the enroute portion of a voyage, approach, and mooring at the destination.