Ship Thickness Measurement and Hull Gauging in Elefsina Bay

Inspection services for ships at Elefsina

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

Gauging locations around the Bay of Elefsina

Inside the yards, most work is renewal-survey and pre-docking gauging on older bulk carriers and tankers, done in the dock or alongside the repair quays. At the refinery jetties the windows are shorter and set by the cargo programme, so readings concentrate on main deck, deck piping and ballast spaces that can be entered safely during operations, subject to the terminal's permit-to-work rules. Ships at anchor or in lay-up are boarded by launch, and on a reactivation the first task is often confirming that spaces can be ventilated, tested and certified safe after a long period closed.

Elefsina also suits combined programmes. A fleet manager with one ship docking at Skaramangas and another waiting at anchor in the bay can have both gauged by the same team in one trip, and the Perama yards and the Piraeus anchorages are within easy reach by road. We plan such combined mobilisations so that the visa and travel arrangements cover the whole window, and so that the order of jobs follows the docking dates rather than the other way round. Where a laid-up ship is also being sold, the buyer's and seller's superintendents can attend the same gauging, which avoids a later argument over whose readings to trust.

• Skaramangas Shipyards — dry-docking and heavy repair of large tankers and bulk carriers, with renewal-survey gauging of bottom, side shell, tanks and holds in the dry dock
• Elefsis Shipyards — docking and repair at the head of the bay, including pre-docking and in-dock gauging for steel renewal planning
• Refinery jetties at Elefsina and Aspropyrgos — deck plating, deck piping and accessible ballast tank gauging on tankers within terminal permit rules
• Elefsina anchorage — ships waiting for orders, repair slots or sale, boarded by launch for condition, pre-purchase and pre-docking gauging
• Lay-up moorings in the bay — reactivation gauging of ballast tanks, sea water and fire main piping, and deck structure after long idle periods
• Commercial port of Elefsina — dry bulk and general cargo ships gauged during cargo operations by arrangement with the agent

Regulation and market context for ships in Elefsina bay

Ships in the bay are under Greek and EU rules. Port state control follows the Paris MoU, and the Mediterranean SOx emission control area that took effect on 1 May 2025 applies throughout the Saronic Gulf, so ships burn compliant low-sulphur fuel or rely on scrubbers. On a ship that has spent months in lay-up with its scrubber idle, the wash-water and overboard lines deserve a close look before reactivation: stagnant sea water and failed linings are a combination that thins pipe walls without obvious warning. EU ETS and FuelEU Maritime apply to voyages from here just as they do from Piraeus.

The market around Elefsina turns on decisions about older ships. An owner whose 20-year-old bulk carrier is due its fourth renewal survey must weigh the steel renewal it will need against the ship's remaining earning life; a buyer looking at a laid-up tanker needs to know whether the hull will support a CAP or vetting programme. Gauging done before the ship enters the yard gives both of them a defensible basis for that call. With most Greek ship managers a short drive away in Athens and Piraeus, the people taking the decision usually attend in person, and they expect readings presented by area so they can see where the steel is going.

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

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

The team flies into Athens International Airport and reaches the Elefsina shore by road. Entry to Skaramangas Shipyards, Elefsis Shipyards and the refinery terminals is controlled, so passes are applied for through the ship's agent with crew lists and technician certificates sent ahead; launches for ships at anchor or in lay-up are booked the same way. As Greece is a Schengen state, each technician travels on a Schengen visa obtained in India. For reactivations, where the date often hangs on a charter being fixed, we suggest starting the visa process once reactivation looks likely rather than when it is confirmed.

• 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.

Related