A class surveyor boards your vessel in Busan and asks for one thing before entering the engine room: the planned maintenance system records. In ten minutes she knows whether your critical equipment has been maintained on schedule, whether overdue jobs have been acknowledged, and whether your PMS is a working operational system — or a set of forms completed the week before her arrival. Under ISM Code Element 10, a functioning PMS is not optional. Class societies verify it. Flag state auditors check it. PSC inspectors review its outputs. Yet most vessels still run maintenance on paper job cards and spreadsheets that no one audits between port calls. If your team is ready to move past that, sign up free and see how Marine Inspection's digital PMS transforms survey readiness from day one — no credit card, no lengthy onboarding, full offline capability from the first voyage.
Ship PMS & Maintenance Compliance — Key Numbers
ISM Code
Mandatory PMS Standard
Element 10 requires a documented planned maintenance system for all ships holding a Document of Compliance
30%
Maintenance Cost Reduction
average saving reported when fleets switch from reactive to planned preventive maintenance systems
18%
Less Unplanned Downtime
reduction in unplanned downtime reported by vessels using digital PMS platforms versus paper-based systems
5 yr
Class Survey Cycle
standard special survey cycle during which PMS records form the primary evidence base for class renewal
What ISM Code Element 10 Actually Requires
Most companies know they need a PMS. Fewer understand what auditors specifically look for — and what generates non-conformities. The four sub-elements below are what every ISM audit and class survey evaluates. Schedule a demo to see how Marine Inspection maps to each ISM element out of the box — no configuration required.
10.1
Inspections & Defect Reporting
Regular ship and equipment inspections carried out on schedule. All defects formally logged, assigned to responsible person, and tracked to closure with evidence.
Auditors verify: inspection records completed on time, defects closed with documentation
10.2
Planned Maintenance System
PMS covers all equipment and systems. Maintenance intervals based on maker manuals, flag state requirements, and class rules — not arbitrary calendar dates.
Auditors verify: intervals defined, jobs completed on schedule, records signed and retained
10.3
Class Survey Compliance
All class-surveyed equipment tracked in the PMS. No equipment passes its survey due date without documented extension or completion evidence presented to class.
Auditors verify: class due dates in PMS, no overdue items without formal extension
10.4
Critical Spares Management
Critical spare parts identified, minimum onboard levels defined, inventory tracked. Procurement lead times factored into maintenance planning so parts arrive before the job is due.
Auditors verify: critical spares list current, inventory accurate, procurement process followed
The PMS Lifecycle: 6 Phases Every Vessel Must Run
A best-practice PMS is not a document — it is a continuous operational cycle. The vessels that pass class surveys without conditions are running all six phases consistently, not just executing maintenance when something breaks.
Phase 1
Plan
Define Equipment & Intervals
All equipment catalogued with maker, model, serial number
Intervals set per maker manual, class rules, flag state requirements
Critical equipment flagged; class survey dates integrated
Output
Complete equipment register with rolling maintenance schedule
Phase 2
Execute
Carry Out & Record Jobs
Job cards issued; completion recorded with timestamp and officer signature
Parts consumed logged against job; running hours recorded
Defects found raised as separate work orders with priority
Output
Signed completion records and updated equipment history
Phase 3
Track Defects
Manage & Close Deficiencies
Defects categorised: safety-critical, class-affecting, operational
Superintendent notified of safety-critical items; deferral needs approval
Open defect list reviewed at monthly safety meeting
Output
Closed-loop defect register: discovery to resolution with full trail
Phase 4
Spares
Manage Parts & Inventory
Critical spares tracked against minimum onboard levels
Requisitions auto-generated when stock falls below minimum
Lead times factored in — parts ordered ahead of job due date
Output
Live inventory aligned to maintenance schedule
Phase 5
Survey Ready
Class & Flag State Evidence
Survey due dates tracked with 90/60/30-day advance alerts
Maintenance history report per equipment — instant survey evidence
Overdue acknowledgements with reason codes stored digitally
Output
Full survey pack generated in under 60 seconds
Phase 6
Improve
Analyse & Optimise
Recurring defects trigger interval review and root cause analysis
Completion rates and overdue trends reported to shore monthly
Dry dock scope built from accumulated defect and class renewal data
Output
Data-driven maintenance planning and dry dock preparation
Critical Equipment: What Must Be in Your PMS
Class surveyors focus their attention on systems where failure creates immediate safety risk. Every item below must have a defined interval, a complete job history, and an upcoming due date visible in the PMS at all times. Start your free trial and load your equipment register in minutes — Marine Inspection ships with pre-built templates for all standard equipment categories.
Critical Equipment Categories — PMS Coverage Requirements
Equipment where PMS gaps create immediate class survey findings or PSC deficiencies
Propulsion & Steering
Main Engine — cylinder heads, fuel injection, turbocharger
Running hours per maker manual + class requirement
Steering Gear — hydraulics, ram seals, rudder bearing
Annual survey item — class mandatory
Auxiliary Engines — all four maintenance levels
250 / 1,000 / 4,000 / 8,000 running hours (typical)
Fire Safety & LSA
Fire Detection System — detector testing, panel, alarm check
Weekly tests + annual survey + 5-year full survey
Lifeboats & Rescue Boats — engine, release gear, hydrostatic releases
Weekly / monthly / annual / 5-year release gear overhaul
EPIRBs & SARTs — battery, self-test, registration
Monthly self-test + annual service + battery per expiry
Pollution Prevention
Oily Water Separator — filter, 15ppm alarm, overboard valve
Monthly checks + annual calibration certificate
Ballast Water Treatment System — UV lamp hours, filter, dosing
Per maker manual; UV lamp at rated hours
Incinerator — burn chamber, oil burner, flue gas system
Monthly + annual survey; emission standards testing
Navigation & Communication
VDR / S-VDR — annual performance test, data integrity, capsule
Annual certificate from approved service provider — class mandatory
GMDSS Equipment — DSC, MF/HF radio, Inmarsat, NAVTEX
Annual survey + battery replacement per expiry
Radar / ARPA — performance monitor, scanner, standards test
Annual survey + performance check after any repair
Paper vs. Digital PMS — Where the Gap Shows
2+ hrs
Paper: Survey Evidence
Chief engineer assembles job cards, running hour logs, and calibration records across multiple voyage folders for one equipment item.
< 60 sec
Digital: Full Equipment History
Complete maintenance history, running hours, parts used, and defect record for any equipment — instantly on any device, online or offline.
90/60/30
Advance Survey Alerts
Automated alerts to superintendent and chief engineer before every class survey due date, certificate expiry, and critical maintenance interval.
Zero
Overdue Class Findings
Marine Inspection users report zero overdue critical maintenance findings at class surveys. No equipment slips past its survey date undetected.
3 PMS Failures That Generate Class Conditions
These are the failures class surveyors and ISM auditors encounter most consistently — and the fixes that prevent them.
Records Don't Match Physical Equipment Condition
What Auditors Find
Job cards show overhaul completed on schedule but physical inspection reveals worn components or incorrect clearances. Paper records created without actual work done to standard — major non-conformity under ISM Code.
How to Prevent It
Mandatory photo evidence on job closure — clearance measurements, parts replaced, before-and-after condition. GPS-timestamped photos that cannot be backdated. Superintendent reviews completion evidence from shore before the job closes.
Overdue Jobs With No Acknowledgement or Deferral Record
What Auditors Find
Jobs overdue by weeks or months with no deferral reason, no superintendent approval, and no evidence anyone on board or ashore was aware. Treated as a failure of the SMS itself — not just an operational slip.
How to Prevent It
Automatic escalation when a job passes its due date — alert to chief engineer, then superintendent within 48 hours. Deferral requires reason code and digital sign-off. Every overdue job has a documented decision trail auditors can follow.
Calendar Intervals Used Instead of Running Hours
What Auditors Find
Main engine maintenance scheduled by calendar month instead of running hours as required by the maker's manual. Running hours not recorded in the PMS at all — resulting in equipment that is either over-maintained or under-maintained relative to actual use.
How to Prevent It
Digital PMS with running hour counter updated at every noon log. Jobs triggered automatically at the correct running hour threshold, not a calendar date. Supports both interval types — and combination triggers — per maker requirements simultaneously.
Expert Perspective
"The distinction I observe most consistently between vessels that pass class surveys without conditions and those that generate multiple recommendations is not equipment age — it's the quality of maintenance evidence. A well-maintained older vessel with complete digital records and a clean overdue job register will have a smoother survey than a newer vessel with a paper PMS nobody reviews between port calls. The fleets that have built disciplined digital PMS habits now have a structural advantage at every survey — and that advantage compounds over a five-year class cycle as their equipment history database grows richer and more credible."
Marine Engineering & Class Survey Operations Review
Planned Maintenance Systems · International Fleet Management
Make Your Next Class Survey the Smoothest One Yet
Marine Inspection gives chief engineers and fleet superintendents a complete digital PMS — equipment registers, interval tracking, running hours, defect management, spare parts, and class survey due dates — with offline mobile access and fleet-wide visibility from one dashboard.
Frequently Asked Questions
Is a planned maintenance system (PMS) legally mandatory for all ships?
Yes. Under ISM Code Element 10, a documented PMS is mandatory for all ships operated by companies holding a Document of Compliance — covering all passenger ships, cargo ships of 500 GT and above, and mobile offshore drilling units on international voyages. The PMS must be a genuine operational system, not a set of templates. Class societies and flag state administrations verify PMS compliance during ISM audits and annual surveys. Non-conformities related to PMS failures can result in withdrawal of the Safety Management Certificate. Sign up free to start building a compliant digital PMS for your fleet today.
What is the difference between calendar-based and running-hours-based PMS?
A calendar-based PMS schedules maintenance at fixed time intervals regardless of actual equipment usage. A running-hours-based PMS triggers maintenance when equipment reaches a specified operational hour count, matching manufacturer recommendations which are almost always expressed in running hours. For main engines, auxiliary generators, and cargo pumps, a calendar-only system will either over-maintain (if the vessel is idle) or under-maintain (if on high-intensity operations). Best-practice digital PMS platforms support both interval types simultaneously and trigger whichever threshold is reached first — per the maker's manual requirement.
How do class societies use PMS records during surveys?
Class surveyors use PMS records as primary evidence that planned maintenance on class-surveyed equipment has been completed on schedule and to the required standard. For Continuous Survey of Machinery (CSM) programmes, some class societies credit equipment surveys based on documented maintenance records rather than physical inspection — reducing the cost and disruption of opening-up. For CSM credit, the PMS must show maintenance carried out within the approved interval, by qualified personnel, using the approved procedure, with results recorded and ideally supported by photo evidence.
Does Marine Inspection's PMS platform work offline on vessels at sea?
Yes. Marine Inspection is built offline-first. The complete PMS — equipment register, job cards, running hour counters, spare parts inventory, and defect register — is fully accessible without internet. Engineers complete jobs on mobile devices in the engine room, attach photo evidence, and update running hours entirely offline. All entries are GPS-timestamped at creation and cannot be retroactively modified — critical for class survey integrity. When the vessel reaches port or regains connectivity, all data auto-syncs to the shore dashboard. Schedule a demo to see the offline workflow in action on a live vessel scenario.
Ready to Run a PMS That Actually Impresses Class Surveyors?
Join fleet managers and chief engineers who use Marine Inspection to track equipment maintenance, running hours, defects, spare parts, and class survey due dates — with offline mobile access, photo evidence capture, and fleet-wide superintendent visibility built for real-world operations.
