PMS vs CMMS for Vessel Operations: Which Does a Yacht Need?

The distinction matters in practice. A generic CMMS from the industrial maintenance world — Maximo, SAP PM, Fiix, UpKeep — is built around asset registers, work orders, and predictive maintenance analytics for factories, hospitals, and facilities. It can track maintenance tasks. But it does not understand the ISM Code, cannot produce a survey history export in the format a class society surveyor expects, lacks the flag state certificate tracking that maritime operations require, and does not have the running hours integration that vessel engine maintenance demands. A maritime PMS is built from the ground up for the vessel environment: watch-keeper integration, running hours tracking from engine telegraphs, defect register with the nonconformity and root cause analysis structure the ISM Code requires, and survey-period maintenance history reports that surveyors can actually use.

The ISM Code's Functional Requirements for a Safety Management System include: maintenance of the ship and equipment in accordance with applicable rules and regulations, with identification of equipment and technical systems whose sudden failure could result in hazardous situations. The system must include procedures for reporting, correcting, and recording non-conformities, accidents, and hazardous occurrences. PSC inspectors and class surveyors look for a maintenance system that can demonstrate this — not just that tasks are being logged. Generic CMMS platforms require extensive customisation to produce the ISM-structured defect register, nonconformity reports, and survey period summaries that maritime regulations expect. That customisation is a significant hidden cost, and the resulting system is never as clean as a purpose-built maritime PMS.

Very large cruise ships and LNG carriers may use enterprise-level CMMS platforms like Maximo or SAP PM because they already have shore-side IT teams maintaining these systems for fleet-wide asset management. Even in these cases, the CMMS is typically complemented by a maritime-specific compliance layer. For yachts — private and charter, from 24m to 100m+ — this complexity level is not justified. The captain does not have a fleet maintenance manager. The DPA needs to access records remotely over a satellite connection. The chief engineer is looking for today's overdue tasks at 07:00, not configuring work order routing rules. Purpose-built yacht PMS platforms are designed for this context.

Running hours integration is non-negotiable — engine-based maintenance intervals are hours-based, not calendar-based, and the PMS must track engine hours automatically or with a simple daily log entry. Without this, oil change intervals drift and manufacturer warranty compliance is compromised. The defect register must allow defects to be raised, assigned for corrective action, and closed with evidence — the ISM Code requires this audit trail. Survey history export must produce a date-sorted list of all completed maintenance for a selected period with crew sign-off evidence — this is what a surveyor requests on boarding. Offline capability is critical: vessels are often without reliable connectivity, and a PMS that requires a live internet connection to function is operationally unacceptable.

Port State Control officers have seen every type of vessel maintenance record. A PMS binder with gaps in sign-off, overdue tasks with no corrective action, and a defect list that has not been updated in months tells a PSC inspector that the vessel's safety management culture is poor — this increases the depth and scope of inspection. For class society surveys, an incomplete maintenance history means the surveyor must extend the scope of physical inspection to verify the state of equipment they cannot confirm has been maintained. This increases haulout time and survey cost. At resale, buyers' surveyors evaluate maintenance records as part of vessel valuation — vessels with comprehensive PMS records command a premium. A vessel where records show poorly or not at all is treated as having deferred maintenance liability. For insured events such as engine failures or flooding, insurers expect to see maintenance records demonstrating the equipment was properly serviced — poor records weaken the claim.