Thickness Measurement for Ferries and Visiting Ships at Helsingør on the Øresund

Inspection services for ships at Helsingør

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

Where a ship can be gauged in and around Helsingør

The ferry berths are the centre of the commercial harbour, with linkspans at which the double-ended ships load from either end. During normal service there is no time to work aboard, but a ferry laid by at the harbour for maintenance, or tied up during a period of reduced sailings, can be gauged at its berth: car-deck plating, end-door and ramp structure, accessible ballast and heeling tanks where fitted, voids and machinery-space piping. The ferry's own crew normally prepares the spaces, and we set the order of work so that tanks are opened, ventilated and released in sequence rather than all at once, which keeps the ship ready to return to the route at short notice.

With no commercial drydock in the town, dockings for the crossing's ferries and for any ship based here are taken to yards elsewhere in Denmark, Sweden or further afield, chosen by the owner. Readings taken at the berth before the docking let the yard and the class surveyor start from a steel list rather than a blank page. Across the strait, Helsingborg is a far larger cargo port with tanker, container and ro-ro berths, and for a ship calling there the gauging is arranged on the Swedish side. The marina and the small-craft harbours have boatyard services, but these serve leisure craft and small working boats rather than merchant ships.

• Ferry berths and linkspans — car-deck, end-door, ramp and tank gauging on the Helsingborg ferries while they are laid by for maintenance.
• Reduced-service periods — short machinery-space piping and sea-chest checks on a ferry tied up between rotations.
• Harbour quays outside the ferry area — condition gauging on visiting workboats, tugs or small cargo vessels lying alongside.
• Docking yards elsewhere in the region — renewal-survey and docking gauging on Helsingør-based ferries, with the readings from the berth carried forward.
• Helsingborg, across the strait — tank, hold and deck gauging on cargo ships calling at the Swedish port, arranged as a separate job.

Ferry inspections, Sound traffic and port state control

Denmark carries out Paris MoU port state control through the Danish Maritime Authority, and a ferry crossing between two EU states is also inspected under the EU's own regime for ro-ro passenger ships and high-speed craft on regular services, which brings inspectors aboard on a set cycle. Findings from those inspections, from class annual surveys and from the operator's planned maintenance are what usually lead to a gauging request on the Helsingør ferries. Traffic transiting the strait reports to the Sound VTS, and many ships take a pilot for the passage, but neither touches hull condition; for those ships the inspection picture is formed at their ports of call, wherever in the Baltic or North Sea those happen to be.

The crossing has also been at the front of decarbonisation in Danish and Swedish ferry traffic, with battery-electric ferries charged from shore at each end. Under the EU ETS, which has applied to shipping since 2024, and FuelEU Maritime, from 2025, ferries above the size threshold report their emissions, and electric operation changes the balance for the operator. None of this alters the steel: a converted ferry keeps its original hull, car deck and ballast structure, and the weight of battery installations and their new foundations is one more reason to confirm the condition of the decks and frames that carry them. Ice class is seldom a factor on so short a route in the southern Kattegat approaches.

Ships trading to Helsingør 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.

How a thickness measurement job runs at Helsingør

Most of the work on a Helsingør job happens before the team boards: scope, plan and access are settled first, so the time on board goes on measurement.

Copenhagen Airport at Kastrup is the nearest international gateway, and the coastal railway runs north from the city to Helsingør. The team travels from India on Schengen visas, which take time to obtain, so ferry overhauls are best fixed with us well before the maintenance period starts. Access to the ferry terminal and the ship is arranged through the operator or the ship's agent; for a job at Helsingborg, the technicians simply cross the strait on the ferry itself.

• 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.

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