Maritime inspection · Denmark

Ultrasonic Thickness Measurement at Lindø Port of Odense and on Odense Fjord

The Port of Odense has moved much of its activity to Lindø, the former A.P. Møller shipyard near the mouth of Odense Fjord, where heavy industry for offshore wind shares the site with a large ship-repair yard. Ships come here to dock, to load turbine components and foundations, and to work bulk and project cargo, while smaller vessels still use the harbour in the city itself. Dry-dock periods at Lindø are the main gauging opportunity. Atlantis sends its technicians from India to the vessel, whether she is in dock or alongside.

Docking periods at Fayard

Fayard runs large dry docks at Lindø and handles tankers, bulk carriers, ro-ro ships, ferries, container ships and offshore units. A ship in dock here can have her full renewal-survey programme gauged, with readings handed to the yard and class as each area is finished.

Offshore wind heavy industry

Lindø's quays and halls are used for assembling and loading offshore wind turbines and foundations. Installation vessels, heavy-lift ships and barges calling for these loads offer deck, crane-pedestal and sea-fastening areas for gauging and crack detection.

Scrubbers fitted during the retrofit wave

The repair yard at Lindø fitted scrubbers to many ships when owners rushed to retrofit them, and those systems now have years of service behind them. Ships returning to dock are a natural point to measure wash-water lines, overboard pipes and hull penetrations.

Inspection services for ships at Odense

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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Lindø port of Odense and Odense Fjord

Odense Fjord is a shallow inlet on the north coast of Funen, opening towards the Kattegat through a narrow entrance at its mouth. Lindø, at Munkebo near that entrance, was for decades the main shipyard of the A.P. Møller group, where some of the largest container ships and tankers of their day were built, until the yard closed in 2012. The Port of Odense bought the site two years later and now runs it as Lindø port of Odense: an industrial port with quays for ocean-going ships, very large production halls, a heavy gantry crane and the outsize dock from the shipbuilding era. The original city harbour lies at the head of the fjord, at the end of a dredged channel and canal, and is used by smaller ships serving Funen's industry.

The traffic reflects what Lindø has become. Offshore wind manufacturing on the site, including turbine assembly and the fabrication of large foundations, brings installation vessels, heavy-lift ships and barges to load components. The repair yard draws merchant ships from across northern Europe for dockings, scrubber and ballast water treatment retrofits, repairs and conversions, and it also appears on the European List of ship recycling facilities. Bulk and breakbulk cargoes move over the port's newer terminal, and project cargo uses the heavy-lift capacity left from shipbuilding. In the city harbour, coasters and smaller bulk carriers continue to call for local industry, although parts of the old waterfront have been redeveloped for housing and offices and no longer handle cargo at all.

For thickness measurement, Lindø is above all a docking location. Fayard's dry docks take a very wide range of ship sizes, and owners route ships here for renewal surveys because steel renewal, coating and machinery work can all be done in one stay. That makes it a place where the full TM programme for a second, third or fourth renewal survey is carried out, with the hull dry and the tanks open. Ships waiting for their dock slot sometimes lie at the port's quays for a few days first, which allows tank gauging to begin before docking. Offshore wind vessels follow campaign schedules and are gauged when they lie alongside between loads, while ships in the city harbour are measured during their discharge.

Dry docks, quays and berths at Lindø and Odense

At Fayard, the team works for the owner or manager inside the yard's programme. Staging, lighting, ventilation and gas-free certificates come through the yard and the superintendent, and the gauging sequence is agreed so that blasting, coating and steel work are not held up: tanks expected to need renewal are measured first, letting the yard order and cut steel while the rest of the programme continues. With the hull dry, bottom and side shell, sea chests, rudder and stern frame are reached from the dock floor or from staging, and pitting in bottom plating can be mapped properly.

Away from the docks, work is done afloat. Installation vessels and heavy-lift ships at the wind quays can be measured on deck and around crane pedestals between loading operations, keeping out of the site's lifting exclusion zones. Bulk carriers and general cargo ships at the port terminal and in the city harbour are gauged while they work cargo. Ships lying at a repair quay after leaving dock, or waiting for their slot, give longer windows for tank, deck and piping readings, and these afloat periods are often used for scrubber and ballast-water piping checks that need the systems shut down.

  • Fayard dry docks — full renewal-survey gauging of shell, bottom, sea chests, cargo and ballast tanks with the ship dry.
  • Fayard repair quays — afloat tank, deck and piping measurement before or after the docking, including scrubber lines.
  • Lindø wind quays — deck, crane-pedestal and sea-fastening gauging with crack detection on installation and heavy-lift vessels.
  • Lindø port terminal — holds and ballast tanks on bulk and breakbulk ships during cargo work.
  • Odense city harbour — hold and tank gauging on coasters and smaller bulk carriers alongside in the inner port.

Thickness measurement through the survey cycle at Odense

How much steel has to be gauged depends on which survey the ship is due for, its type and its age. The pattern below is the usual one under IACS unified requirements; the attending surveyor and the class rules for the ship decide the final extent. For a ship calling at Odense, we agree the programme with the class and the owner before the team mobilises.

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.

Retrofits, recycling and regulation at Lindø

Port state control at Lindø and in the city harbour is carried out by the Danish Maritime Authority under the Paris MoU. For ships here, though, the strongest drivers of gauging come from class and from the owner: a renewal survey falling due, a condition of class to clear, or a decision about whether to retrofit equipment or extend the ship's life. A docking at Lindø is when those decisions are taken, and the thickness data gathered in dock sets the steel renewal list that the yard then works to.

Because the repair yard also holds a place on the European List of ship recycling facilities, the end of a ship's life can be decided on the same site as her repairs. EU-flagged ships must be recycled at a listed facility, and an Inventory of Hazardous Materials is required for EU-flagged ships and for foreign ships of 500 GT or more calling at EU ports. The EU ETS (from 2024) and FuelEU Maritime (from 2025) weigh on older, less efficient tonnage, so some owners docking at Lindø are choosing between a major steel and equipment refit and a sale. A thorough gauging record from the docking, reported on the class formats, gives them the evidence to choose.

Ships trading to Odense are inside a sulphur emission control area, where fuel must not exceed 0.10% sulphur unless an exhaust gas cleaning system (scrubber) is fitted. Scrubber wash-water piping, the overboard discharge and the hull penetration around it are among the fastest-corroding parts of a modern ship, so they belong in the gauging scope at every docking and, on open-loop systems, between dockings.

The gauging work Lindø dockings bring

Most Odense work is dry-dock gauging for renewal surveys and repairs. The superintendent sends the TM plan, the previous gauging report and the docking specification; the team arrives as the ship enters dock and follows the yard's sequence; and readings pass to the attending surveyor and the yard planners as each area is completed, so steel renewal can be fixed early in the stay. Alongside that, offshore wind vessels at the quays ask for deck and foundation checks between campaigns, and ships under repair afloat ask for piping and tank readings. Ships in the city harbour bring smaller, simpler scopes fitted around their discharge. Typical requests include:

  • Third renewal survey gauging on a bulk carrier in dock at Fayard: transverse sections, hold frames, topside and hopper tanks to the TM plan.
  • Shell, bottom and sea chest gauging on a product tanker during her docking survey, with pitting in the bottom plating mapped.
  • Scrubber wash-water and overboard pipe readings on a container ship returning to the yard where her system was fitted.
  • Crane pedestal and sea-fastening crack detection with deck gauging on a heavy-lift ship loading wind foundations.
  • Condition gauging for an owner deciding between life extension and sale while the ship lies at the repair quay.

How a thickness measurement job runs at Odense

A gauging job at Odense 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.

Copenhagen Airport is the usual international arrival point for Odense, with direct intercity trains across the Great Belt to Odense station, and Billund Airport is a second option to the west. Lindø lies outside the city at Munkebo, reached by road. Fayard issues its own yard passes and safety induction, arranged by the superintendent, while the wind quays and port terminal have site access rules handled through the agent or the vessel operator. The team travels from India on Schengen visas, so yard dates should reach us as soon as the slot is fixed.

  • 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

  • Crude and product tankers
  • Bulk carriers
  • Container ships
  • Ro-ro ships and ferries
  • Offshore wind installation vessels
  • Heavy-lift and project cargo ships
  • Coasters and general cargo ships

Frequently asked questions

Can you gauge our ship in dock at Fayard as the owner's team?

Yes. We are contracted by the owner or manager and work alongside the yard, following the TM plan agreed with the attending surveyor. The superintendent arranges gas-freeing, staging and lighting with the yard. Readings are reported as each tank or section is finished, and areas needing renewal are marked so the yard can start cutting and ordering steel without waiting for the final report.

Is it worth gauging tanks before the ship enters dock at Lindø?

Usually. If the ship lies at a repair quay or calls at a nearby port beforehand, measuring the ballast and cargo tanks most likely to need steel lets the yard prepare the renewal from the first day in dock. The docking itself is then used for the shell, the bottom and other areas that can only be reached dry, which shortens the critical path of the stay.

Do you inspect offshore wind installation vessels at Lindø?

We can, during their time alongside between loads. Deck plating under component stowage, crane pedestals, sea-fastening points and jacking-area structure are the usual focus, combining thickness readings with magnetic particle testing of welds where cyclic loading concentrates. Work on deck is coordinated with the site's lifting operations and stays out of the exclusion zones around cranes and loads.

Can ships still be gauged in Odense's city harbour?

Yes. Coasters, smaller bulk carriers and general cargo ships that use the inner harbour can be gauged alongside during discharge or while waiting for cargo. The channel and canal limit the size of ship that reaches the city, so work there is mainly on short-sea tonnage, and holds, ballast tanks and deck are the usual scope.

Does thickness measurement at Odense 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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