Maritime inspection · France
Ship Hull and Tank Gauging at the Port of Ajaccio, Corsica
Ajaccio is the main port of south-west Corsica. Ferries link it with Marseille, Toulon and Nice, coasters bring fuel, cement and general freight to the island, and cruise ships anchor off the old town in season. It has no large drydock, so gauging here happens afloat, in the gaps of a ferry or coaster timetable. Atlantis NDT sends its technicians from India to the ship, arranged through the ship's agent.
Mainland ferry rotations
Ro-pax ferries from Marseille, Toulon and Nice arrive on regular schedules. Their vehicle decks, ramps and ballast tanks can be gauged during a berth stay and the data used to set a docking steel estimate.
Island supply coasters
Small tankers, bulk coasters and cargo ships feed Corsica's fuel and construction trades. A call at Ajaccio gives access to holds, deck structure and accessible tanks while the ship discharges.
Docking happens elsewhere
Ships needing the bottom checked usually go to a mainland yard. Gauging at Ajaccio supplies the measured wastage list ahead of that docking, so steel work can be planned and ordered in advance.
Inspection services for ships at Ajaccio
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.
ExploreSpecial Survey Thickness Measurement
Gauging for the 5, 10, 15, 20 and 25-year special (renewal) surveys and intermediate surveys, plus pre-docking steel estimates.
ExploreCAS (Condition Assessment Scheme)
Thickness measurement and survey support for the IMO Condition Assessment Scheme, and what CAS asks of an older tanker today.
ExploreCAP 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.
ExploreESP Gauging
Thickness measurement and close-up survey support for oil tankers, chemical tankers and bulk carriers under the ESP Code.
ExploreHull Structural Integrity
Substantial and excessive corrosion, pitting, grooving, buckling and fatigue cracks, with magnetic particle and penetrant crack detection.
ExploreShip Piping Inspection
Wall-thickness gauging of cargo, ballast, fuel, sea-water and fire-main piping, with minimum-wall checks and isometric sketches.
ExploreScrubber Piping Inspection
EGCS wash-water and overboard discharge piping, the hull penetration area and scrubber welds, checked between dockings.
ExploreIHM (Inventory of Hazardous Materials)
IHM Part I surveys, sampling and maintenance for the EU Ship Recycling Regulation and the Hong Kong Convention.
ExploreMarine 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.
ExploreAjaccio, the gulf and the ships that call
Ajaccio sits at the head of a wide, deep gulf on the west coast of Corsica, and the harbour opens to the south-west. The commercial quays lie beside the old town, with the ferry terminal close to the centre and cargo berths a short distance along the shore. The gulf's depth lets large vessels come in without difficulty, and the harbour gives reasonable shelter, though the south-westerly wind can make approaches and anchoring uncomfortable. For gauging, the main constraint is not the approach but how long a ship stays and how much of it the crew can release.
Passenger and vehicle ferries dominate the timetable. Ships from the French mainland make the crossing regularly, many of them operating under the public service arrangements that keep Corsica connected all year, and the same vessels return on a predictable cycle. Freight arrives mostly on coastal tankers, bulk coasters and short-sea cargo ships that serve the island's fuel depots, construction trades and supermarkets. Cruise ships anchor off the town between spring and autumn and run tenders ashore; these calls are too short for anything but a limited scope, and they depend entirely on a calm day.
The island's seasons shape the work. Summer is the heavy ferry period, with ships running at full stretch and little appetite for releasing tanks, while winter timetables are lighter and more suitable for an inspection that needs spaces to be opened. Superintendents often use that winter window to gauge a ferry afloat before it leaves for a docking on the mainland. Coasters follow the demand for fuel and building materials, which is steadier, so a berth stay during discharge is the natural time to gauge a hold or an accessible tank. Planning therefore starts from the ship's own rotation and from the weather forecast for the gulf.
Where gauging is realistic at Ajaccio
Ajaccio has repair capacity for small craft and fishing boats, but not a drydock for ferries or sea-going cargo ships. A vessel that needs its shell, sea chests or propeller area examined out of water goes to a yard on the mainland, most often in the Marseille or Toulon area. What we can do at Ajaccio is the afloat portion: vehicle decks, hatch coamings, ballast tanks, void spaces, deck piping and the machinery-space and scrubber piping that the engineering team is ready to release. For many owners that is exactly the data a docking specification needs.
Berth stays at the ferry terminal give the longest uninterrupted time, since the ship is stationary while vehicles load. Cargo coasters at the commercial quays offer a window during discharge, when holds are empty and can be inspected after ventilation. Ships at anchor in the gulf, whether cruise ships or vessels waiting for a berth, can be reached by launch via the agent. Every compartment needing entry is gauged only under the ship's own entry permit system, and tank spaces on tankers wait for a gas-free certificate.
- Ferry terminal berths — gauging of vehicle decks, ramps, stern door structure and ballast tanks during turnarounds.
- Commercial cargo quays — hold, hatch coaming and deck gauging on coasters while they discharge.
- Fuel berth — deck plating, deck piping and accessible ballast tanks on small tankers, with gas-free tanks left for a yard stay.
- Gulf of Ajaccio anchorage — launch-served gauging on cruise ships and vessels awaiting a berth, in settled weather.
- Lay-by berths in the harbour — owners' condition checks on ships idle between charters.
- Mainland yards in Marseille and Toulon — the usual docking destination, fed by readings taken in Ajaccio.
Thickness measurement through the survey cycle at Ajaccio
Every renewal survey asks for more thickness measurement than the last, and for oil tankers, chemical tankers and bulk carriers the ESP Code adds close-up survey on top. The table is the usual shape of the work; the class rules and the surveyor set the exact extent, which is why the measurement plan for a job at Ajaccio is agreed in writing before mobilisation.
| Survey | When it falls | What the thickness measurement usually covers |
|---|---|---|
| Annual survey | Every year, within three months of the anniversary date | General examination. Gauging where the surveyor finds suspect areas or where substantial corrosion was recorded at an earlier survey. |
| Intermediate survey | In place of the second or third annual survey | Suspect 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. 1 | Around 5 years | The first full baseline: suspect areas and selected plating and stiffeners, usually with modest steel renewal. |
| Renewal survey No. 2 | Around 10 years | Wider gauging of deck, bottom and side plating, transverse sections across the cargo area on ESP ships, and more close-up survey. |
| Renewal survey No. 3 | Around 15 years | Extensive 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 later | Around 20 and 25 years | Gauging extended to most structural members in cargo and ballast spaces. Charterers often add a Condition Assessment Programme. |
| Docking survey | Twice in each five-year period | Bottom and side shell, sea chests, rudder and stern area while the hull is dry; suspect bottom plating gauged. |
Port state control and rules that apply to ships at Ajaccio
France belongs to the Paris MoU, and port state control inspections of foreign ships in French ports, including those in Corsica, are carried out by the national ship safety centres under the maritime administration. Ferries on island routes may be French-flag or foreign-flag, and the inspection regime treats them according to their risk profile. A visible deficit in structure or watertight integrity found at inspection can delay a sailing, which is a practical argument for an advance gauging check before the winter refit.
European regulation touches the same ships. Maritime transport has been part of the EU ETS since 2024, and the FuelEU Maritime rules have applied since 2025; both influence how long an owner keeps an older ferry or coaster in service, and so how much steel renewal it is worth spending on. The EU Ship Recycling Regulation requires an Inventory of Hazardous Materials on ships calling at EU ports. Because Corsica is an island with limited yard capacity, a thorough pre-docking gauging report also helps an owner book the dock slot and steel on the mainland with confidence.
Since 1 May 2025 the whole Mediterranean has been a sulphur emission control area, so ships calling at Ajaccio 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.
Typical thickness gauging jobs at Ajaccio
Most jobs here are small and shaped by a ship's rotation. The superintendent sends the last gauging report and the survey due date, we identify which spaces can be released during the stay, and the team gauges those while the ship works its cargo or passengers. Typical requests:
- Ballast-tank and vehicle-deck gauging on a mainland ferry in winter, as input to a steel estimate for docking at a mainland yard.
- Hold and hatch-coaming gauging on a bulk or general cargo coaster while it discharges at the commercial quay.
- Deck, deck-piping and accessible ballast-tank readings on a small product tanker discharging at the fuel berth.
- Condition gauging of a coaster on a lay-by berth for a buyer's pre-purchase inspection.
- Scrubber piping and machinery-space pipework readings on a cruise ship at anchor in the gulf, if sea conditions allow a launch.
How a thickness measurement job runs at Ajaccio
Most of the work on a Ajaccio job happens before the team boards: scope, plan and access are settled first, so the time on board goes on measurement.
Ajaccio Napoleon Bonaparte Airport serves the town, and flights from mainland France and several European cities connect it. Many technicians would route through Paris or another French hub on their way from India. The ship's agent arranges port access and any launch boat. France is part of the Schengen area, so Schengen visas are obtained in India before travel, usually once the ship's call or docking date is confirmed and the owner has supplied an invitation letter. Ferry and coaster calls are known in advance, which helps schedule the trip.
- 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
The inspection team is mobilised from India for each job; nobody is stationed at the port, so mobilisation is planned against the vessel's schedule and visa lead times. Our founder and Responsible NDT Level III, who holds ASNT NDT Level III in UT, RT, MT, PT and VT and has over eleven years of international field experience, plans and supervises the work. Technicians are certified under the company's written practice to ASNT SNT-TC-1A, and the company holds ISO 9001 and ISO 14001 certification.
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
- Ro-pax ferries from the mainland
- Small product and fuel tankers
- Coastal bulk carriers
- General cargo coasters
- Cruise ships at anchor
- Tugs and pilot boats
- Fishing and workboats
Frequently asked questions
Is there a drydock at Ajaccio?
Not for ferries or sea-going cargo ships. The port's repair work is for small craft and fishing boats. Ships needing bottom or sea chest inspection go to a mainland yard, typically around Marseille or Toulon. We can gauge afloat at Ajaccio first, so the yard receives a measured steel list when the ship arrives.
Can a ferry be gauged during its Ajaccio berth stay?
Yes, in the spaces the crew can release. Vehicle decks, ramps and ballast tanks are the usual scope, and the plan is built around the loading sequence so the ship's operations are not delayed. Summer timetables leave little room; winter rotations allow a more thorough job and sometimes a second visit.
Can tank gauging be done on a small tanker at Ajaccio?
Deck plating, deck piping and ballast tanks that the ship declares safe can be gauged during discharge. Cargo tanks need a gas-free certificate, which the ship normally arranges for a yard stay rather than a short fuel call. If the tanker is heading to a docking, we scope the cargo tanks for that visit instead.
What if the gulf is rough on the day of an anchorage job?
We plan with a fallback. A strong south-westerly can make a launch transfer unsafe, so the schedule carries an alternative date or a berth call. The agent and the master decide on the day whether boarding is safe, and we do not ask a ship to compromise safety for a thickness reading.
Does thickness measurement at Ajaccio 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 QuoteRequest 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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