Maritime inspection · Greece

Thickness Gauging and Hull Inspection for Ships in Thessaloniki

Thessaloniki is the main port of northern Greece and a gateway for cargo moving to and from the Balkans, so the ships here are mostly working cargo rather than lying in a repair yard: bulk carriers loading or discharging grain, minerals, fertiliser and steel, container feeders, and tankers serving the refinery. That shapes the gauging we do. We mobilise a team from India to take readings during cargo stays and at anchor in the Thermaic Gulf, planned around the cargo programme.

Gauging fitted into cargo stays

Ships at Thessaloniki are usually working cargo, so gauging is built into port calls. Holds are measured as they are emptied, ballast tanks as cargo operations allow, and decks and coamings whenever the hatch covers are open.

Balkan bulk and steel trades

Grain, minerals, fertiliser and steel products moving to and from the Balkan hinterland bring mostly Handysize and Supramax bulk carriers and multipurpose ships, many of them older tonnage on regional trades.

Thermaic Gulf anchorage windows

Ships waiting for a berth or for orders lie in the Thermaic Gulf off the port. A few days at anchor is a practical window for pre-docking gauging ahead of a yard call in southern Greece or abroad.

Inspection services for ships at Thessaloniki

Each service has its own page with the method, the class requirements and what the report contains.

Ultrasonic Thickness Measurement (UTM)

Hull, tank, deck and bulkhead gauging recorded on the class thickness-measurement formats, with sketches and corrosion flagged against the allowable margins.

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Special Survey Thickness Measurement

Gauging for the 5, 10, 15, 20 and 25-year special (renewal) surveys and intermediate surveys, plus pre-docking steel estimates.

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CAS (Condition Assessment Scheme)

Thickness measurement and survey support for the IMO Condition Assessment Scheme, and what CAS asks of an older tanker today.

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CAP Thickness Measurement

Gauging and close-up survey data for a Condition Assessment Programme, the voluntary class service charterers ask for on older tankers and bulk carriers.

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ESP Gauging

Thickness measurement and close-up survey support for oil tankers, chemical tankers and bulk carriers under the ESP Code.

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Hull Structural Integrity

Substantial and excessive corrosion, pitting, grooving, buckling and fatigue cracks, with magnetic particle and penetrant crack detection.

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Ship Piping Inspection

Wall-thickness gauging of cargo, ballast, fuel, sea-water and fire-main piping, with minimum-wall checks and isometric sketches.

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Scrubber Piping Inspection

EGCS wash-water and overboard discharge piping, the hull penetration area and scrubber welds, checked between dockings.

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IHM (Inventory of Hazardous Materials)

IHM Part I surveys, sampling and maintenance for the EU Ship Recycling Regulation and the Hong Kong Convention.

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Marine NDT Services

Every NDT method we use on ships, from visual inspection and MPI to PAUT and ACFM, chosen by the defect you are looking for.

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The Port of Thessaloniki and its shipping

The Port of Thessaloniki, run by ThPA S.A., sits at the head of the Thermaic Gulf and is the main cargo port of northern Greece. Its piers handle containers, dry bulk, general cargo and project cargo, and its hinterland reaches well beyond Greece into North Macedonia, Serbia, Bulgaria and Kosovo, with rail and road corridors running north from the quays. The ships that call reflect that role: container feeders and regional services linking to the Mediterranean transhipment hubs, Handysize and Supramax bulk carriers, multipurpose and general cargo ships, and product tankers connected with the HELLENiQ ENERGY refinery west of the city.

Most of these ships are on cargo stays rather than in a yard. A bulk carrier discharging grain or loading minerals may be alongside for several days, and the sequence of cargo work sets which holds and tanks are available at any time. That makes Thessaloniki a port for planned, incremental gauging. A technical manager who knows the ship's renewal survey is approaching can use one or two calls here to measure holds, hatch covers, coamings and ballast tanks, building up the data set before the ship goes to dock and reducing both the work and the uncertainty left for the yard.

Inspection demand also follows the age profile of the regional fleets. Many of the bulk carriers and general cargo ships in Balkan, Black Sea and eastern Mediterranean trades are older ships that change hands often, which brings pre-purchase and on-hire condition gauging. Heavy cargoes such as steel products and scrap are hard on hold structure: grabs and magnets dent tank tops and hopper plating, and impact damage on frames and brackets accelerates local wastage. On ships in those trades we measure frames, brackets, tank tops and lower hopper strakes closely, because that is where condition diverges from the last survey record fastest.

Where gauging is done in and around Thessaloniki

Inside the port, gauging takes place at the bulk and general cargo piers and at the container terminal, always within ThPA's ISPS and safety rules and coordinated through the ship's agent. Bulk and multipurpose ships are the most practical: holds can be measured as they are cleared, and hatch covers and coamings are reachable whenever covers are open. On container ships the work usually concentrates on ballast tanks, deck structure and piping, including scrubber systems, because terminal stays are shorter and cargo spaces are rarely empty.

Outside the port, tankers serving the refinery berths and ships at anchor in the Thermaic Gulf are reached by launch. Northern Greece has no ship-repair cluster on the scale of Perama or Elefsina, so ships needing major steel renewal usually dock elsewhere. Gauging in Thessaloniki is therefore most valuable as preparation, giving the owner a measured steel estimate before the ship sails for its yard and letting the superintendent compare yard offers on the same set of readings. For anyone arranging ship inspection in northern Greece, that preparatory role is the realistic one, and the scope is best planned with the docking yard's needs in mind.

  • Bulk and general cargo piers — hold, hatch cover, coaming and frame gauging on bulk carriers and multipurpose ships as cargo operations free each hold
  • Container terminal — ballast tank, deck and scrubber piping checks on feeders and regional container ships during terminal stays
  • Refinery and fuel terminals west of the city — deck, deck piping and ballast tank gauging on product tankers within terminal permit rules
  • Thermaic Gulf anchorage — pre-docking, pre-purchase and condition gauging on ships waiting for berths or orders, reached by launch
  • Project cargo berths — tank top, hold and lashing-area gauging on multipurpose and heavy-lift ships between cargo operations

Thickness measurement through the survey cycle at Thessaloniki

Every renewal survey asks for more thickness measurement than the last, and for oil tankers, chemical tankers and bulk carriers the ESP Code adds close-up survey on top. The table is the usual shape of the work; the class rules and the surveyor set the exact extent, which is why the measurement plan for a job at Thessaloniki is agreed in writing before mobilisation.

SurveyWhen it fallsWhat the thickness measurement usually covers
Annual surveyEvery year, within three months of the anniversary dateGeneral examination. Gauging where the surveyor finds suspect areas or where substantial corrosion was recorded at an earlier survey.
Intermediate surveyIn place of the second or third annual surveySuspect areas, and on older ships and ESP ships selected ballast and cargo spaces with close-up survey; the extent grows with age.
Renewal survey No. 1Around 5 yearsThe first full baseline: suspect areas and selected plating and stiffeners, usually with modest steel renewal.
Renewal survey No. 2Around 10 yearsWider gauging of deck, bottom and side plating, transverse sections across the cargo area on ESP ships, and more close-up survey.
Renewal survey No. 3Around 15 yearsExtensive gauging of cargo and ballast tank structure and more transverse sections. The survey most likely to turn up steel renewal.
Renewal survey No. 4 and laterAround 20 and 25 yearsGauging extended to most structural members in cargo and ballast spaces. Charterers often add a Condition Assessment Programme.
Docking surveyTwice in each five-year periodBottom and side shell, sea chests, rudder and stern area while the hull is dry; suspect bottom plating gauged.

Rules and trade context for Thessaloniki

As an EU port, Thessaloniki falls under the Paris MoU, with inspections carried out by the Hellenic Coast Guard, and EU ETS and FuelEU Maritime apply to voyages to and from it. The Mediterranean emission control area, in force since 1 May 2025, covers the Aegean, so ships calling here must burn 0.10% sulphur fuel or use a scrubber. On container feeders and bulk carriers fitted with open-loop scrubbers, the wash-water discharge and overboard sections deserve checking, because pitting through to leakage there is a known failure that leads to unplanned repairs and, if found at sea, to an awkward call with the flag.

Thessaloniki's trades also differ from those of southern Greece. The landlocked Balkan states rely on the port, and the Black Sea is a short voyage away through the Turkish Straits, so many ships calling here also work Black Sea and eastern Mediterranean ports with frequent cargo changes. Owners of such ships often have no superintendent attending, so the gauging plan and the report need to be clear enough to act on remotely: readings tied to frame numbers, photographs of the worst areas, and a short summary of what needs attention before the next survey.

Since 1 May 2025 the whole Mediterranean has been a sulphur emission control area, so ships calling at Thessaloniki burn 0.10% sulphur fuel or run a scrubber. Scrubber wash-water piping, the overboard discharge and the hull penetration around it corrode quickly in service and are worth adding to the gauging scope at every docking.

Typical thickness gauging jobs in Thessaloniki

Here the scope is usually built around a cargo call. The superintendent tells us which holds and tanks will be accessible and when; we plan readings to follow the discharge or loading sequence, and send results area by area so the rest can be scheduled for the next call or the yard. Bulk carrier gauging in Thessaloniki is the most common case.

  • Hold and topside tank gauging on a Supramax discharging grain, measured hold by hold as each is emptied, to build the data set for its third renewal survey.
  • Pre-purchase condition gauging on a general cargo ship alongside, covering hatch covers, coamings, tank top and ballast tanks before the buyer confirms the purchase.
  • Scrubber overboard and wash-water piping inspection on a container feeder during a terminal stay, after a leak was reported on a sister ship.
  • Pre-docking gauging on a product tanker at anchor in the Thermaic Gulf ahead of its intermediate survey, focused on deck plating and ballast tanks.
  • On-hire gauging on a Handysize bulk carrier delivering into a time charter, giving owner and charterer an agreed record of hold and hatch cover condition.

How a thickness measurement job runs at Thessaloniki

A gauging job at Thessaloniki runs the same way whatever the ship type. The sequence below is what the superintendent, the attending surveyor and the yard can expect from us.

The team flies into Thessaloniki Airport Makedonia, usually connecting through Athens or another European hub, and reaches the port by road. Port entry under ISPS is arranged through the ship's agent, who also books launches for ships at anchor in the Thermaic Gulf; we send crew lists, technician certificates and equipment lists in advance. Greece is a Schengen state, so technicians travel on Schengen visas obtained in India. Because cargo calls can be fixed at short notice, it helps to tell us about likely Thessaloniki calls early, so a visa is already in hand when the berth date firms up.

  • Send the vessel name or IMO number, ship type, class society, the survey due (annual, intermediate, renewal survey number, CAP or owner's condition survey), the port and dates, and the scope you expect.
  • We confirm the scope against the class rules for that survey, prepare the thickness measurement plan with frame and section references, and say whether the measurement will be credited to a class survey.
  • Mobilisation is planned around visa lead times and the vessel's schedule; the ship's agent arranges port access, and the yard or ship arranges staging, lighting, ventilation and gas-free certificates.
  • Gauging with calibrated ultrasonic thickness gauges: through sound coatings only where the gauge's through-coating mode has been verified on a coated reference, otherwise on cleaned bare steel, with every reading tied to its frame, strake and location on the sketch.
  • Readings are compared with original thicknesses as work proceeds; substantial and excessive corrosion and any cracks are reported to the attending surveyor and the superintendent the same day.
  • The final report is issued on the class thickness-measurement formats with sketches, a summary of locations exceeding the allowable margins, piping tables where piping was in scope, and the gauge calibration and technician certificates.

Who does the work, and when class approval applies

Atlantis mobilises its inspection team from India to the vessel, for each job. There is no office or agent at the port; the team travels to the ship, which is why the planning step comes first. Work is planned and supervised by our Responsible NDT Level III, the founder, who holds ASNT NDT Level III in UT, RT, MT, PT and VT and has more than eleven years of international field experience. Technicians are qualified and certified under the company's written practice to ASNT SNT-TC-1A, and Atlantis is certified to ISO 9001 and ISO 14001.

Thickness measurement that a classification society credits to a class survey has to be carried out by a firm approved by that society under IACS UR Z17. Atlantis is in the process of obtaining UR Z17 approval from DNV, Lloyd's Register and ABS. Until a certificate is issued, the readings we take are for the owner's own decisions, not for credit to a class survey, so tell us the vessel's class and the survey due when you enquire and we set the scope for the right purpose. Owner's and charterer's condition gauging, pre-docking steel estimates, pre-purchase and on-hire or off-hire gauging, and scrubber and piping condition checks between surveys do not need class approval.

Governing codes and standards

  • IACS UR Z7 hull classification surveys
  • IACS UR Z10.1 to Z10.5 (oil tankers, bulk carriers, chemical tankers, double-hull and double-skin ships)
  • IACS UR Z17 approval of service suppliers
  • SOLAS chapter XI-1 regulation 2 and the 2011 ESP Code
  • MARPOL Annex VI regulation 14 and the 2021 EGCS Guidelines (MEPC.340(77))
  • The rules of the vessel's classification society

What you receive

  • Thickness measurement report on the class formats, with sketches
  • Summary of substantial and excessive corrosion against allowable margins
  • Pitting and grooving records with depth and extent
  • Piping wall-thickness tables with isometric sketches
  • Magnetic particle or penetrant crack-detection reports
  • Gauge calibration records and technician certificates

Industries served

  • Bulk carriers
  • General cargo and multipurpose ships
  • Container feeders
  • Product tankers
  • Heavy-lift and project cargo ships

Frequently asked questions

Can you gauge cargo holds while the ship is discharging in Thessaloniki?

Yes, hold by hold. Once a hold is discharged and swept and the stevedores have moved on, we can measure tank top, hopper and side plating and frames safely, with access arranged with the ship. Holds still under cargo are left for a later call or the yard. We agree the sequence with the master and agent so the gauging follows the cargo work rather than delaying it.

There is no large repair yard nearby. Why gauge here rather than in dock?

Because readings taken before the ship reaches the yard let you estimate steel renewal, compare yards and order plate in advance. A ship that arrives in dock with its gauging largely done spends less time waiting while the scope is discovered. Thessaloniki calls, especially longer bulk discharges, are a practical place to do that preparation.

Do you work on ships at anchor in the Thermaic Gulf?

Yes. The agent books a launch, and we board with portable equipment for ballast tanks, holds and deck. Launch transfers depend on sea state, especially in winter, so we leave some slack in the plan for anchorage jobs. Before work starts, the ship has to ventilate, test and certify each tank as safe for entry.

Can the same mobilisation cover ships in Piraeus or Turkish ports?

Often, yes. Thessaloniki is a short flight from Athens, and the Turkish Aegean and Marmara ports are not far. Where the dates line up, we can plan one trip covering several ships, though Turkey needs a separate visa from the Schengen one, so tell us early which countries are involved.

Does thickness measurement at Thessaloniki need class approval?

Thickness measurement that a classification society credits to a class survey has to be carried out by a firm approved by that society under IACS UR Z17. Atlantis is in the process of obtaining UR Z17 approval from DNV, Lloyd's Register and ABS. Until a certificate is issued, the readings we take are for the owner's own decisions, not for credit to a class survey, so tell us the vessel's class and the survey due when you enquire and we set the scope for the right purpose. Owner's and charterer's condition gauging, pre-docking steel estimates, pre-purchase and on-hire or off-hire gauging, and scrubber and piping condition checks between surveys do not need class approval.

Planning a survey or a drydock?

Send the vessel name or IMO number, the class, the survey due and the port. We reply with the scope, the mobilisation plan and a quote for that vessel.

Request a Quote

Request a ship gauging quote

Send the vessel name or IMO number, the class society, the survey due and the port. We reply with the scope, the mobilisation plan and a quote for that vessel.








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