Fresh Water Management Plan for superyachts covering legionella prevention, watermaker operations, and crew health. Compliant with WHO Guide to Ship Sanitation, MLC Standard A3.1, and MCA MGN 397. Professional package with plan template, companion guide, quick reference card, and daily water quality log.
Fresh water management aboard superyachts involves far more than running a watermaker and filling tanks. The complex plumbing networks of large yachts—with extensive hot and cold water systems, multiple calorifiers, deadleg sections, and varying occupation patterns—create ideal conditions for Legionella bacteria proliferation if not actively managed. Under the Maritime Labour Convention (MLC) Standard A3.1, shipowners are required to ensure that all crew members have access to clean, safe fresh water for drinking and personal use. The WHO Guide to Ship Sanitation and MCA Marine Guidance Note 397 establish the specific standards for water quality, testing frequency, and management procedures that apply to commercial vessels. This professional package gives you a complete fresh water management system designed for the operational realities of superyacht life.
Any commercial superyacht—whether operating under a Large Yacht Code or full ISM—is required to demonstrate fresh water management procedures under MLC Standard A3.1. Port state control inspections under MLC frequently examine fresh water provision, and failure to demonstrate a systematic management approach is a recordable deficiency. Vessels that have experienced crew illness, unusual water taste or odour, or that have recently undergone significant plumbing work should treat fresh water management as a priority. Private yachts with complex water systems face the same Legionella risk even without regulatory requirement—the consequences of an outbreak aboard a superyacht are severe for crew and guests alike.
A fully structured Word document covering all aspects of superyacht fresh water management: system description and schematic reference, water sources (watermaker, bunkering, shore connection), treatment and disinfection procedures, tank management and cleaning schedules, hot water system management including calorifier temperatures, deadleg identification and flushing procedures, testing frequency and recording requirements, and procedures for managing water quality incidents. Written specifically for yachts, not adapted from shore-side guidance.
A practical completion guide explaining each section of the plan—how to map and document your water system, how to establish the correct chlorine dosing for your watermaker output, how to set calorifier temperatures to manage Legionella risk, how to schedule tank cleaning and system flushing, and what to do when water quality testing returns an adverse result.
A laminate-ready card for the galley and crew mess covering daily water quality checks, acceptable chlorine and pH ranges, and the immediate actions to take if water quality is suspect. Also includes the reporting procedure for water quality issues under the vessel’s SMS.
An Excel-format daily log for recording watermaker output volumes, chlorine levels, pH readings, tank ullages, and any treatment actions taken. Structured to provide the audit trail required by MLC inspectors and flag state surveyors.
This Fresh Water Management Plan satisfies MLC Standard A3.1 fresh water supply requirements, the WHO Guide to Ship Sanitation (third edition) standards for potable water on ships, and the guidance in MCA Marine Guidance Note MGN 397. It is accepted by the Red Ensign Group (Cayman Islands, BVI, Gibraltar, Bermuda, Isle of Man, United Kingdom), Marshall Islands, Malta, and Bahamas flag states.
This plan was developed with direct reference to MLC enforcement standards, flag state inspection practice, and the specific challenges of superyacht water system management. Legionella risk management in particular is frequently misunderstood in the yachting industry—this plan and its companion guide translate the WHO and MCA guidance into practical procedures that engineers and deck officers can actually implement. The daily log format has been designed to satisfy MLC inspector requirements without creating excessive administrative burden. When MLC or WHO guidance is updated, the package is revised and existing customers receive the update at no additional cost.
30-Day Satisfaction Guarantee
Not satisfied? Contact us and we'll make it right.
Accepted payment methods
Last updated: January 2025
Complete your vessel's compliance documentation package
Ballast Water Management Plan (BWMP) for superyachts. Compliant with the BWM Convention and IMO Guidelines G4 and G8. Professional package with BWMP template, crew training guide, operational procedures, and Ballast Water Record Book template.
IMO MEPC.378(80) compliant Biofouling Management Plan (BFMP) for superyachts. Professional package with BFMP template, companion guide, quick reference card, and Biofouling Record Book template. Meets the 2024 mandatory requirements with specific focus on Australia and New Zealand enforcement.
Crew Familiarisation Package for superyachts covering engineering, deck, and interior departments. Compliant with ISM Code Section 6 and STCW A-VI/1. Professional package with three department-specific familiarisation checklists, companion guide, and quick reference card.