Hull Thickness Measurement for Vessels at Trapani, Sicily

Inspection services for ships at Trapani

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

Where vessels can be gauged in Trapani

Trapani has small shipyards and repair quays that handle ferries, fishing vessels, workboats and coasters rather than ocean-going tonnage. A floating dock or slipway suited to small craft is the typical type of facility, and a ship brought out of the water offers access to the bottom shell, rudder, propeller area and sea chests. For anything larger, owners usually head to Palermo, Malta or the mainland, and gauging in Trapani first gives a head start on the steel estimate.

Afloat, gauging happens at the passenger berths for ferries and hydrofoils, at the commercial quays for coasters, and at fishing berths for trawlers and other fishing boats. A ferry's vehicle deck, ramp and tanks can be measured when the crew has ventilated them. A fishing boat's fuel and ballast tanks, fish hold and deck plating can be gauged when the vessel is laid up. The team agrees the list in advance with the owner or technical manager so that the time available is fully used.

• Small repair yards and slipways: bottom shell, rudder, sea chests and tank structure of craft that can be hauled out
• Passenger and hydrofoil quays: decks, ramps and tanks of Egadi and Pantelleria ferries between sailings or during winter lay-up
• Commercial quays: hull, hold and deck gauging of coasters and small cargo ships
• Fishing berths: fuel tanks, fish holds and deck plating of trawlers laid up between campaigns
• Palermo and Malta: larger drydocks used when a ship's readings require major steel renewal

Port state control and regulation at Trapani

Port state control at Trapani is carried out by the Italian Coast Guard (Guardia Costiera), working through the harbour master (Capitaneria di Porto), under the Paris MoU. Foreign-flag coasters and cargo ships calling here can be selected for inspection, and the structural condition of older small ships is a common focus. Passenger ships on scheduled island services also come under the EU regime for ships in regular service, which makes accurate thickness records valuable for operators.

Fishing vessels follow national and EU rules rather than the same convention regime as larger merchant ships, but owners of older boats still need to understand steel condition before investing in refits or selling. The EU Ship Recycling Regulation applies to ships calling at EU ports above its size threshold, and its inventory requirement is useful to bear in mind during dockings. EU ETS and FuelEU Maritime affect the larger ferries and cargo ships rather than the smallest craft, but they contribute to decisions on fleet renewal.

Since 1 May 2025 the whole Mediterranean has been a sulphur emission control area, so ships calling at Trapani 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.

How a thickness measurement job runs at Trapani

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

Trapani-Birgi airport serves the town with limited links, and Palermo Falcone Borsellino is the larger alternative, with a road transfer to the west of the island. The team travels from India on Schengen visas, so dates are set after visa lead time is allowed for. Port access is arranged through the ship's agent or the yard, and for small craft the owner or technical manager can often arrange access directly.

• 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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