Question 1

A yacht management company operates several vessels, some above and some below the 500GT ISM/ISPS/MLC threshold. What practical management challenge does this create, and how should it be handled?

Accepted Answer

The company must correctly apply the right compliance regime to each vessel individually based on its actual tonnage and trading pattern, rather than applying a single uniform standard across the fleet by assumption — incorrectly assuming a sub-500GT yacht is exempt from all formal compliance, or conversely under-resourcing a 500GT+ vessel's heavier ISM/ISPS/MLC obligations, are both realistic failure modes Fleet management introduces a real risk of treating vessels as a homogenous group rather than checking each one's actual regulatory position — given the hard 500GT line running through ISM, ISPS, and MLC simultaneously, a management company needs vessel-by-vessel compliance tracking, not a one-size-fits-all fleet policy.

Question 2

At what tonnage threshold does the full ISM Code (not just the lighter safety management provisions within the REG Yacht Code itself) become mandatory for a commercial yacht?

Accepted Answer

500GT — above this threshold a commercially registered yacht on international voyages must comply with the full ISM Code, requiring a Document of Compliance (DOC) for the management company and a Safety Management Certificate (SMC) for the vessel This is a hard regulatory line, not a judgement call — a 499GT yacht and a 501GT yacht sit in genuinely different compliance regimes. Below 500GT (and 24m+), the yacht-specific REG Yacht Code safety management provisions apply; at and above 500GT, the vessel steps up into the full SOLAS-derived ISM Code framework with its DOC/SMC audit and certification structure.

Question 3

What is the practical difference for a Master/Chief Officer between operating under the REG Yacht Code's own safety management provisions versus operating under a full ISM DOC/SMC once a yacht crosses 500GT?

Accepted Answer

Full ISM brings external audit cycles (internal audits, external Flag State/RO audits, non-conformity tracking and close-out), a formally documented Safety Management System with defined procedures across all departments, and a shore-based Designated Person Ashore (DPA) the Master must have direct access to at any time Full ISM is a meaningfully heavier compliance regime — formal audit cycles, documented procedures across every department (not just bridge/deck), and a mandatory DPA relationship are all new obligations a yacht crossing 500GT takes on, distinct from the more streamlined safety management approach below that threshold.