Current Gibraltar MLC guidance with a risk-based Fresh Water Safety Plan, water production, bunkering and documented checks.
Choose only your vessel's registered flag. The crew records what can be demonstrated; Vorenico assesses the relevant evidence and identifies outstanding actions.
Vessel name, commercial or private status, length, GT, year and applicable certificate/code.
Evidence supplied, action needed, not checked yet, or not applicable with a clear reason.
Enter a logbook page, inspection date, laboratory report ID, maintenance record or corrective action. This field is text only; documents are shared separately.
Save your draft, export the CSV and share that register and source documents with Vorenico for review.
Example: Weekly water inspection → Evidence supplied → “Inspection 26 Oct 2026; deck logbook p.84; responsible engineer: Chief Engineer”.
Gibraltar MLN 014(b), issued 6 December 2024, supersedes MLN 014(a). Part 3 gives technical evidence-of-compliance guidance for loading, disinfecting, producing, storing and distributing potable water. It recommends a Fresh Water Safety Plan for complex systems, describes weekly inspection practice and distinguishes a 0.2 mg/L chlorine bunkering recommendation from a compulsory universal chlorine requirement. A published MLN is an accepted way to demonstrate compliance, but equivalent or higher alternative evidence may be considered.
This evidence register is a member self-assessment tool; a recorded Vorenico technical review is not a statutory flag-state clearance.
Duty: binding if relevant regulation applies. Conditional: only under stated code and circumstances. Best practice: prudent engineering control, not an independent statutory limit. Review: confirm with the administration or applicable code before claiming compliance.
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Applicability
Determine yacht category, commercial/pleasure use, seafarer status, GT, DMLC, applicable exemptions and accepted equivalences.
When in scope: All Gibraltar-registered yachts; commercial/pleasure applicability varies
Evidence requested: Registry, certificates, manning, DMLC and flag correspondence
Supply
Provide safe drinking water in adequate quantity and quality, considering crew and voyage; check exact applicable paragraph.
When in scope: Where Gibraltar drinking-water regulation applies
Evidence requested: Lab results, drinking water production/transfer volumes, risk assessment
Crew welfare
Food and drinking-water supply is provided free of charge during seafarers’ period of engagement.
When in scope: Seafarers covered by relevant MLC provision
Evidence requested: Crew supply arrangements, policy and accommodation facilities
Inspection
MLN 014(b) describes inspections at intervals no greater than seven days as evidence of compliance. Confirm legal scope and equivalent inspection method.
When in scope: Ships subject to MLC checks and MLN 014(b) compliance method
Evidence requested: Weekly log dates, responsible person, corrective records
Inspection
Inspect drinking-water supplies and storage/handling equipment as well as relevant catering areas, under the authority of the master.
When in scope: Relevant vessel and inspection programme
Evidence requested: Documented scope, crew inspections and findings
Water Safety Plan
Complete hazard analysis, source-to-tap treatment controls, monitoring and corrective actions; guidance recommends a FWSP, not a universal statutory certificate.
When in scope: Especially yachts with complex onboard systems
Evidence requested: System diagram, risk register and FWSP
Bunkering
Mark, cap, drain, clean and stow dedicated hoses off deck; flush/discharge before use.
When in scope: Water taken from shore or barge
Evidence requested: Hose inventory, hygiene instructions, bunkering log
Distribution
Identify potable fill lines and physically prevent non-potable connections; verify independent supply pumps and pipe routing.
When in scope: Bunkering and internal distribution
Evidence requested: P&ID, line marking and backflow inspection
Treatment
Guidance calls for bypass protection and audible/visible fault detection, with a safe outcome on malfunction. Verify individual design and accepted alternatives.
When in scope: Where a primary automatic disinfection unit is installed
Evidence requested: Control philosophy, alarms, tests and commissioning
Desinfection
MLN states that routine bunkering chlorination is not required in every case; 0.2 mg/L free chlorine (or 1.0 mg/L chloramines if chloraminated) is described as good practice where appropriate.
When in scope: When chlorinating loaded potable water
Evidence requested: Residual tests, source details, dosing procedure and contact time
UV
UV lacks downstream residual action; provide appropriate intensity monitoring, alarms and maintenance, considering location and microbial growth in pipework.
When in scope: UV installed for drinking water treatment
Evidence requested: UV sizing, sensor data, lamp record and alarms
Watermaking
Assess marine intake pollution, prefiltration and product quality. Reliable online monitoring and rapid action are essential where RO is relied on as treatment.
When in scope: Seawater RO/watermaking installed
Evidence requested: RO operation procedures, conductivity, reject diversion and water testing
Watermaking
Evaluate pH, corrosion and mineral stabilisation for demineralised seawater before long storage or distribution.
When in scope: Very low-mineral permeate entering tanks/distribution
Evidence requested: Water chemistry, materials assessment and conditioning logs
Storage
Tanks should be accessible, marked potable water, safely coated and operated in rotation to reduce stagnation; verify materials and vents.
When in scope: Potable water tanks under MLN Part 3
Evidence requested: Tank inventory, inspection schedule, drawings, coatings
Storage
Notice says storage should normally not be below two-day supply but can be adjusted for reliable onboard production. This is guidance, not an automatic absolute statutory threshold.
When in scope: Under MLN 014(b) storage guidance and actual vessel production
Evidence requested: Volume calculation, person numbers and verified watermaker capacity
Maintenance
Use manufacturer-based maintenance of UV, filters, tanks, calorifiers, outlets and hoses; distinguish illustrative notice intervals from mandatory legal frequencies.
When in scope: All onboard water production/distribution components
Evidence requested: PMS tasks, servicing logs and inspected deficiencies
Incidents
If monitoring shows unsafe water, consider isolate/alternative supply, investigate, repair and verify before return to service. Record owner, deadline and final test.
When in scope: All water systems with testing or incident programmes
Evidence requested: Incident log, lab reports, actions and return-to-service authority
Source quality
The published Gibraltar MLN 014(b) has an apparent copy-edit reference to the Isle of Man official logbook in §18. Do not interpret this as a Gibraltar requirement to use a Manx logbook; obtain GMA clarification if relied upon.
When in scope: Gibraltar inspection records from MLN 014(b)
Evidence requested: GMA clarification, Gibraltar vessel official logbook and actual inspection format
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