What is the name given to the complete system including toilets, hoses, pipes, holding tanks and fittings designed to receive, retain, vent and pump out sewage?

The correct answer is the term "Sewage Management System," which encompasses the entire assembly designed for handling human waste on a vessel. This system includes toilets, hoses, pipes, holding tanks, and fittings working together to effectively receive, retain, vent, and pump out sewage.

A sewage management system is crucial in marine environments for maintaining hygiene and preventing pollution of waterways. It is specifically engineered to manage waste in a way that prevents leaks, meets environmental regulations, and facilitates proper disposal.

Retention systems are typically components of a sewage management system, focusing on the holding aspect of waste before it is processed or discharged. Treatment systems refer to processes that often take place within a sewage management system but don’t encompass the entire assembly required for managing waste. Discharge systems exclusively concern the aspect of releasing waste, which is one part of the total sewage management process.