Ferrol Ship Thickness Gauging: Outer Port, Bulk Cargo and Offshore Wind Vessels

Inspection services for ships at Ferrol

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

Where gauging happens at Ferrol

Gauging at Ferrol takes place alongside, at the outer port's bulk and general cargo berths and at the commercial quays inside the ría. A bulk carrier discharging at the outer port gives access to the holds as they are emptied, and the sequence of discharge is agreed with the chief officer and the stevedores so the technicians can reach frames, hopper and topside tanks and transverse bulkheads. Decks of heavy-lift and wind component carriers are measured at the quay, with particular attention to sea-fastening areas and the plating around crane pedestals.

The naval yard and arsenal are restricted establishments whose work is not commercial, so merchant ships needing a docking normally go elsewhere on the Galician coast; yards in Vigo have the floating docks and repair quays for most mid-sized ships. Readings taken at Ferrol are formatted as a steel list that goes ahead of the ship to that yard. Where a ship waits at the ría's anchorage, a launch from the agent reaches it, and the sheltered water inside the ría makes boarding easier than on the open coast. Equipment travels with the technicians.

• Outer port bulk berths — hold frame, hopper tank and ballast tank gauging on large bulk carriers during discharge
• Outer port general and project cargo quays — deck and coaming readings on heavy-lift and wind component carriers
• Offshore wind marshalling quays — deck, sea-fastening area and ballast tank readings on installation and carrier vessels
• Commercial quays inside the ría — hull, tank and deck gauging on general cargo ships and tugs
• Fishing and small-craft berths — hull and tank readings on coastal fishing vessels in port
• Pre-docking steel lists for yards at Vigo or elsewhere on the Galician coast

Administration, naval restrictions and the offshore wind build-out

Port state control at Ferrol falls under the Paris MoU, carried out by the Spanish maritime administration, the Dirección General de la Marina Mercante, through the local Capitanía Marítima. The commercial port sees a steady stream of bulk carriers of varied age and flag, and the older ones are those inspectors target. The naval base shapes the port in other ways: parts of the ría are restricted to military traffic, and commercial ships follow the pilots' instructions on routing and berthing with that in mind.

EU measures add to the pressure on owners. A ship entering an EU port must hold an Inventory of Hazardous Materials under the bloc's recycling legislation, and both the carbon market (2024) and FuelEU Maritime (2025) now apply to shipping. Spain's plans for floating offshore wind have made Galicia's outer ports a focus of public investment, which brings in heavy-lift ships, tugs and installation vessels from across Europe. Charterers on these projects often ask for independent thickness readings before accepting a ship, and the same readings help owners plan maintenance between campaigns.

Wherever a ship is outside a sulphur emission control area, the global 0.50% sulphur cap applies, and many of the ships calling at Ferrol meet it with an exhaust gas cleaning system rather than compliant fuel. Scrubber wash-water piping, the overboard discharge and the hull penetration around it corrode quickly in service, especially on open-loop systems, and are worth adding to the gauging scope.

How a thickness measurement job runs at Ferrol

The sequence for a thickness measurement job at Ferrol is short and written down, so the yard, the surveyor and the superintendent know who arranges what.

Technicians usually fly to A Coruña's Alvedro airport or to Santiago de Compostela, connecting through Madrid or Lisbon from India, and reach Ferrol by road. The outer port is a further short drive. The ship's agent arranges port passes and any launch for the anchorage, while the naval zones are not part of commercial access. Spain is in the Schengen area, so each technician needs a visa obtained in India, applied for once the ship's stay is confirmed and supported by an invitation naming the vessel. Weather affects arrivals, so travel is booked late.

• 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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