The Most Common PSC Deficiencies
Across MOU Regions

The most common PSC deficiencies that lead to detention are not surprises. The same categories appear at the top of Paris MOU, Tokyo MOU, and Indian Ocean MOU annual reports year after year — fire safety, lifesaving appliances, ISM, MLC, certificates. I have seen vessels detained for an EPIRB battery that expired two months before the inspection. The superintendent knew. The master knew. Nobody fixed it.

The frustrating part is that PSC deficiencies are not a mystery. The same categories come up year after year across every MOU region. Paris MOU publishes an annual report. Tokyo MOU publishes one. Indian Ocean MOU publishes one. The data is there for anyone who wants to look. And still, vessels keep getting caught with the same things.

So here is what I have seen repeatedly — the deficiency categories that keep appearing, why they happen, and what you actually need to do before the PSCO boards.

The 10 MOU Regions — What You Need to Know

There are 10 PSC regimes worldwide. Each has its own focus and appetite for enforcement. What will get you a deficiency in Rotterdam may be handled differently in Mumbai or Guangzhou. Knowing which MOU your vessel is entering — and what they prioritise — is basic preparation that too many superintendents skip.

One thing that catches people out: your PSC history is not regional. A detention in Tokyo is visible to Paris. A bad record in the Indian Ocean MOU will increase your inspection probability in the Mediterranean. Everything is linked through the THETIS and APCIS databases. Manage your record accordingly.

The Deficiency Categories That Keep Coming Up

I am not going to dress this up. These are not obscure regulatory technicalities. These are the basics — the things that should never be wrong on any vessel. And yet they dominate the top of every MOU annual report, every single year.

Fire Safety — Number One, Every Year

Fire safety tops the list globally and has for as long as I can remember. The PSCO will walk through the fire station early, and he is not just looking — he is testing. I have watched PSCOs physically pull a damper handle, spin a fire pump up, check extinguisher pressures one by one. If your maintenance record says the CO2 system was serviced but the cylinder weights do not match — you have a finding. The record means nothing without the physical evidence to back it.

What I see repeatedly on vessels:

• Portable extinguishers with tags in order but pressure gauges in the red — someone checked the tag, nobody checked the gauge
• Fixed CO2 systems where the pilot cylinder weight has not been verified — this is a detention-level finding in most MOU regions
• Fire dampers that will not close from outside the space because the indicator has seized with corrosion
• Fire detection panel showing faults that the crew has "gotten used to" — the PSCO has not
• Fire control plans that were printed when the vessel was delivered and have not been updated since

LSA — Where Most Detentions Come From

Lifesaving appliance deficiencies are the fastest route to detention. A PSCO finds an EPIRB with an expired battery and a liferaft hydrostatic release that is three months overdue — that is two LSA deficiencies, and he is already thinking about whether this vessel is fit to sail. Add two more deficiencies from fire safety and you are being detained.

The honest reason LSA deficiencies keep happening is that the service dates creep up quietly. Nobody is looking at the EPIRB battery expiry date in the middle of a busy loading operation. It expires. The vessel sails. Three months later, a PSCO finds it.

• Lifeboat on-load release mechanisms — the most commonly missed. Manufacturer servicing schedules are strict and most companies are behind on them
• Liferaft hydrostatic releases — 12-month service interval, very easy to lose track of when you have multiple rafts
• EPIRB battery expiry and MMSI registration — I have seen vessels where the MMSI was registered to the previous owner. That is a finding
• Immersion suit condition — zips seize, seals crack. Check them properly, not just that they are hanging in the locker
• Falls and wires on lifeboats — if they have not been turned end-for-end or replaced within the required period, that is a finding regardless of visual condition

ISM — The Finding That Worries Inspectors Most

An ISM deficiency is a different type of problem. A broken extinguisher tells a PSCO there is a maintenance gap. An ISM deficiency tells him the management system is not functioning — and that changes how he looks at everything else on the vessel.

The most damaging ISM findings I have seen are not the paperwork failures. They are the ones where the crew cannot answer basic questions about their own emergency procedures. A PSCO asks the AB on watch: where is your muster station? What do you do in case of fire in the engine room? If the answer is hesitation and guesswork — that is an ISM finding, and it puts the whole inspection under a different light.

• Monthly drills not conducted — or conducted but not recorded with all crew names and station assignments
• Muster list not updated after the last crew change — extremely common, extremely easy to fix
• Near-miss and accident reports — many vessels have zero reported near-misses over 12 months. PSCOs do not believe this. It suggests the crew are not reporting, which is itself a finding
• SMS manuals that reference equipment or procedures the vessel no longer uses

MLC — Enforcement Has Changed

Ten years ago, MLC was something you dealt with during a flag state audit. Now every PSCO in Paris, Rotterdam, and Hamburg checks it as a matter of routine, and enforcement in Asian ports has caught up significantly. If you are still treating MLC as a back-of-the-file exercise, you will get caught.

The areas where I see companies get caught:

• Rest hour records with alterations — even a single altered entry in the last 3 months will trigger deeper scrutiny of the entire record
• Complaint procedure not posted in crew accommodation — it must be visible, in a language the crew understands. A laminated notice behind the door does not count if nobody can find it
• Seafarer employment agreements not on board or not signed — particularly when crew have recently joined
• Potable water — no records of testing or disinfection after the last bunkering. PSCOs are now checking this routinely

Certificates — The Most Avoidable Deficiency There Is

I have very little sympathy for certificate deficiencies. They are 100% preventable with basic calendar management. A certificate expires on a known date. There is no excuse for a PSCO to find an expired SMC or an officer with an out-of-date CoC.

What still happens:

• Flag state certificate renewed but the old one is still in the Master's file — PSCO picks up the wrong one
• Officer joins with a CoC endorsed for a different vessel type — someone in crewing did not check
• STCW endorsements for advanced fire fighting or medical first aid expired — these get missed because they are separate from the CoC
• Class survey status on board is 10 days old — the requirement is not more than 7 days prior to inspection
• Vessel operating on a dispensation but the dispensation letter is not on board — this happens more than it should

When a Deficiency Becomes a Detention

Not every deficiency leads to detention, but understanding where the line is matters. A PSCO detains a vessel when he decides it is not fit to sail — and that decision is influenced by a few things beyond just the severity of individual findings.

• A single detainable deficiency — an inoperable lifeboat, a fire pump that cannot reach pressure, an ISM breakdown where the crew clearly have no functioning safety management. One finding like this is enough
• Accumulation — multiple deficiencies, even minor ones, starts putting detention on the table. The picture it paints is a vessel where nothing is being maintained properly
• Repeat deficiencies — if the same item was cited in your last PSC inspection and appears again, the PSCO treats it as evidence that your management system is not correcting problems. That is a serious indicator
• The Master's response — PSCOs assess how the Master handles findings. If he is defensive, dismissive, or cannot produce basic records when asked, that works against you. If he is prepared and can show what corrective actions are already planned, that matters

What to Do Before the Next Inspection

Start with your last PSC deficiency report. Whatever was cited last time is the first thing a PSCO will check this time. If those items are not fully closed — not just "actioned" but physically rectified and evidenced — you are starting the inspection in a hole.

Then work through the top five deficiency categories in order. Not via email to the vessel asking if everything is fine. The vessel will say yes. Get evidence — photos of the CO2 cylinder weights, the EPIRB self-test record, the hydrostatic release service certificate.

1. Fire safety — physical check, not a paper check. Every extinguisher, every damper, fire pump pressure test recorded in log
2. LSA — pull every expiry date for EPIRBs, liferaft releases, lifeboat falls. Put them in a spreadsheet. If anything expires in the next 90 days, arrange the service now
3. Certificates — pull every statutory certificate and every crew CoC. Check expiry. Check endorsements match vessel type
4. Drill records — confirm monthly fire and abandon ship drills conducted, full crew list on each record, Master signed
5. Rest hours — review the last 3 months of records. Look for patterns, not just one-off violations. Patterns are what PSCOs are trained to spot

Why This Keeps Happening Year After Year

The superintendent sends a checklist to the vessel two weeks before port arrival. The Master replies: all in order. The PSCO boards and finds four deficiencies. None of them are new. All of them were on the checklist.

This happens because a checklist reply is not verification. The Master is busy, the crew are busy, and "all in order" is the path of least resistance. Nobody physically went around and checked. The office assumed the vessel had it handled. The vessel assumed the office would follow up. Nobody did.

The companies that consistently come through PSC inspections clean are not the ones with the newest ships or the biggest fleets. They are the ones where the superintendent is looking at actual deficiency data from the vessel — not a reply to an email — and every open item has a deadline and a person responsible for closing it. That is the difference.