Maritime inspection · Greece

Kavala: Ultrasonic Hull Gauging in the Northern Aegean

Kavala is a northern Aegean port in eastern Macedonia, used by bulk carriers, tankers, general cargo ships and ferries to the island of Thasos. Cargoes here are industrial and seasonal, and many ships are older working tonnage. Readings are fitted to cargo calls and to time at anchor in the bay. A team travels from India to the ship, and the scope is set in advance.

Industrial cargo calls

Fertiliser, bulk raw materials and refined products pass through Kavala, which suits readings taken hold by hold as cargo is cleared, plus deck and coaming gauging whenever covers are open.

Energy shipping in the Gulf

Oil and gas activity in the northern Aegean brings tankers and service vessels to the area. Deck, piping and ballast tank gauging fits tanker calls within terminal rules.

Preparation for a distant yard

There is no large repair yard in the area, so gauging here prepares ships for docking elsewhere. Measured readings give the owner a steel estimate before the ship sails for a yard.

Inspection services for ships at Kavala

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.

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Special Survey Thickness Measurement

Gauging for the 5, 10, 15, 20 and 25-year special (renewal) surveys and intermediate surveys, plus pre-docking steel estimates.

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CAS (Condition Assessment Scheme)

Thickness measurement and survey support for the IMO Condition Assessment Scheme, and what CAS asks of an older tanker today.

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CAP 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.

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ESP Gauging

Thickness measurement and close-up survey support for oil tankers, chemical tankers and bulk carriers under the ESP Code.

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Hull Structural Integrity

Substantial and excessive corrosion, pitting, grooving, buckling and fatigue cracks, with magnetic particle and penetrant crack detection.

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Ship Piping Inspection

Wall-thickness gauging of cargo, ballast, fuel, sea-water and fire-main piping, with minimum-wall checks and isometric sketches.

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Scrubber Piping Inspection

EGCS wash-water and overboard discharge piping, the hull penetration area and scrubber welds, checked between dockings.

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IHM (Inventory of Hazardous Materials)

IHM Part I surveys, sampling and maintenance for the EU Ship Recycling Regulation and the Hong Kong Convention.

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Marine 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.

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Kavala: a northern Aegean port with an industrial hinterland

Kavala sits on the coast of eastern Macedonia, facing the island of Thasos across a narrow strait. The main port is built around a sheltered harbour at the foot of the old town, with commercial quays and a ferry terminal, and the Kavala Port Authority handles the commercial side. Beyond the central harbour there is an industrial area to the east, around Nea Karvali, where tankers and other ships work at private jetties, and there are ferry connections to Thasos from Kavala and from Keramoti further east along the coast.

The ships that visit are mixed. Bulk carriers load and discharge raw materials and agricultural products, general cargo ships serve regional industry, product tankers supply fuel and carry refined products, and ro-pax ferries run to Thasos in the season. The northern Aegean also has offshore oil and gas activity, which brings tankers, service craft and supply vessels to the area. A good share of the ships involved are older tonnage on regional trades, which means local wear on holds, hatch covers and coamings from the cargo handled, and wastage on weather decks and ballast tanks from long service.

The northern Aegean has its own weather. Cold northerly winds in winter can be strong, and summer meltemi episodes affect the strait. Ships at anchor in the bay are normally well sheltered, but launch transfers depend on conditions, and tank entry preparations must be finished before the window starts. Because the region lacks a major repair centre, ships needing steel work usually leave for yards in Thessaloniki's area, central Greece or the Athens zones, and gauging at Kavala is valuable as an early picture of hull condition.

Where gauging can be done around Kavala

In the commercial harbour, gauging is done alongside at the cargo quays and the ferry terminal, subject to the port authority's ISPS rules and arranged through the agent. A bulk carrier discharging gives access to emptied holds, hatch covers and coamings in sequence, while a general cargo ship offers tank top, side shell and frames once holds are clear. A ferry alongside for the day allows deck, ramp and accessible plating readings, with tank work reserved for lay-up.

Industrial jetties and the anchorage extend the options. Tankers at the energy and fuel terminals are limited to deck, deck piping and ballast spaces within permit rules, and ships at anchor in the bay can be boarded by launch for pre-docking or condition gauging. There is no large drydock in the area, so heavy steel renewal is done elsewhere. For anyone arranging ship inspection in northern Greece, Kavala works best as a staging post where readings are collected before the ship moves to its yard.

  • Commercial cargo quays — hold, hatch cover, coaming and deck gauging on bulk and general cargo ships during discharge
  • Ferry terminal — deck, ramp and ballast tank readings on Thasos ferries, best during lay-up
  • Industrial jetties near Nea Karvali — deck, piping and ballast tank gauging on tankers and cargo ships within terminal rules
  • Kavala Bay anchorage — pre-docking and condition gauging on ships waiting for berths or orders, by launch
  • Lay-up positions — extended programmes on ships idle between seasons or charters

Thickness measurement through the survey cycle at Kavala

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 Kavala is agreed in writing before mobilisation.

SurveyWhen it fallsWhat the thickness measurement usually covers
Annual surveyEvery year, within three months of the anniversary dateGeneral examination. Gauging where the surveyor finds suspect areas or where substantial corrosion was recorded at an earlier survey.
Intermediate surveyIn place of the second or third annual surveySuspect 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. 1Around 5 yearsThe first full baseline: suspect areas and selected plating and stiffeners, usually with modest steel renewal.
Renewal survey No. 2Around 10 yearsWider gauging of deck, bottom and side plating, transverse sections across the cargo area on ESP ships, and more close-up survey.
Renewal survey No. 3Around 15 yearsExtensive 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 laterAround 20 and 25 yearsGauging extended to most structural members in cargo and ballast spaces. Charterers often add a Condition Assessment Programme.
Docking surveyTwice in each five-year periodBottom and side shell, sea chests, rudder and stern area while the hull is dry; suspect bottom plating gauged.

Port state control and regional trade

Port state control at Kavala is carried out by the Hellenic Coast Guard under the Paris MoU. The Mediterranean emission control area for sulphur, in force since 1 May 2025, includes the Aegean, so ships here burn 0.10% sulphur fuel or run an exhaust gas cleaning system. EU ETS has applied to shipping since 2024 and FuelEU Maritime since 2025, and both cover voyages calling at Kavala. Ships on regional runs may also need an Inventory of Hazardous Materials aboard when calling at EU ports.

Trade patterns in this part of Greece shape the work. Raw materials and industrial products bring bulk carriers and general cargo ships whose owners often have no superintendent attending, so the report needs to be clear and usable without a visit: readings tied to frame numbers, photographs of the worst areas and a short summary of what needs attention. The northern Aegean energy sector adds tanker and service traffic with its own vetting expectations, and owners of those ships may ask for gauging before a charter inspection.

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

Most Kavala jobs are shaped by the cargo call. The superintendent tells us which holds or tanks will be accessible and when, we plan readings to follow the discharge or loading sequence, and we send results area by area so the rest can be scheduled for the next call or the yard.

  • Hold and hatch cover gauging on a bulk carrier discharging at the cargo quay, taking readings hold by hold as each is cleared.
  • Deck plating and deck piping readings on a product tanker at an industrial jetty, ahead of a vetting inspection.
  • Pre-docking gauging of ballast tanks on an older general cargo ship at anchor in the bay, giving the manager a steel estimate for a yard elsewhere in Greece.
  • Pre-purchase condition gauging on a coastal tanker alongside, with the buyer's surveyor attending.
  • Deck, ramp and ballast tank readings on a Thasos ferry during winter lay-up, supporting the refit specification.

How a thickness measurement job runs at Kavala

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

Teams fly into Kavala's Alexander the Great Airport near Chrysoupoli, usually connecting via Athens or another European hub, or into Thessaloniki and continue by road. Port passes, any launch boarding and jetty permits are arranged by the ship's agent from the crew list and equipment details we send ahead. Technicians need a Schengen visa issued in India, since Greece follows the Schengen rules. Cargo calls here are often fixed at short notice, so flagging likely Kavala visits early lets us keep a visa ready when the berth date firms up.

  • 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

We send the team from India to the ship for each job rather than keeping staff at the port, and plan the mobilisation around visas and the vessel's itinerary. The work is planned and supervised by the founder, our Responsible NDT Level III (ASNT NDT Level III in UT, RT, MT, PT and VT, with more than eleven years of international field experience). Technicians hold certification under the company's written practice to ASNT SNT-TC-1A; Atlantis is ISO 9001 and ISO 14001 certified.

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

  • Bulk carriers
  • General cargo ships
  • Product tankers
  • Ro-pax ferries to Thasos
  • Offshore service and supply vessels
  • Coastal tankers
  • Multipurpose ships

Frequently asked questions

Can holds be gauged while a bulk carrier is discharging at Kavala?

Yes, hold by hold. Once a hold is emptied and swept, we can measure tank top, hopper and side plating and frames with access arranged by the ship. Any hold still carrying cargo waits for a later call or for the yard. We agree the sequence with the master and the agent so gauging follows the cargo work.

Is there a drydock at Kavala for steel renewal?

No large drydock is available. Ships needing hull steel work usually go to yards near Thessaloniki, in central Greece or around Athens. Gauging at Kavala is therefore preparation: readings give the owner a steel estimate, help compare yard offers and let plate be ordered before the ship sails.

Can ships at anchor in Kavala Bay be gauged?

Yes. The agent books a launch and we board with portable equipment, though transfers depend on sea state and the master's decision. Tanks must be ventilated, tested and certified before entry. We leave slack in the schedule for northerly weather and tell the superintendent early if the window narrows.

What can be done on a tanker at an industrial jetty?

Normally the deck, its piping and the ballast tanks, under the permit rules of the jetty operator. Work may pause during cargo transfer. The agent and the terminal confirm what is allowed, and we plan readings to fit around discharge rather than hold it up.

Can one trip cover Kavala and Thessaloniki or Alexandroupoli?

Often. All three lie in northern Greece and can be linked by road or a short flight, so one mobilisation can cover several ships if their dates line up. Send us the vessels and windows, and we will plan the order of jobs and visa period together.

Does thickness measurement at Kavala 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 Quote

Request 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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