Maritime inspection · United Arab Emirates

Hull Gauging and Thickness Measurement for Tankers in Fujairah

Fujairah, on the UAE's Gulf of Oman coast outside the Strait of Hormuz, is one of the world's major bunkering hubs, and its anchorages are busy with tankers waiting for bunkers, cargo, orders or crew changes. Those waits are often long enough to gauge. We provide hull gauging in Fujairah for CAP, pre-purchase and pre-docking scopes, and inspect scrubber piping on ships lifting high-sulphur fuel. The team flies in from India and goes out to the ship by launch.

Afloat work off the east coast

Most Fujairah jobs never come alongside. The crew prepares ventilated, gas-tested tanks, the agent arranges boat transfers, and readings follow a priority list so key compartments are covered even if the ship sails early.

Scrubber lines during a bunker call

Ships with exhaust gas cleaning systems lift high-sulphur fuel here. A bunker call or a wait at anchor gives time to measure wash-water, discharge and overboard piping, where acidic water and high flow cause the fastest wall loss.

A step before the docking yard

Large tankers usually dock in Dubai, Bahrain or further afield. Pre-docking readings taken at Fujairah let the yard size its steel order before the ship sails for the dock.

Inspection services for ships at Fujairah

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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Fujairah's anchorages, oil terminals and the ships that wait there

Fujairah faces the Gulf of Oman from the UAE's east coast, beyond the Strait of Hormuz, which places it on the main tanker route into and out of the Gulf. The Port of Fujairah and the Fujairah Oil Industry Zone behind it hold one of the region's largest concentrations of oil storage, fed by crude and product tankers and by the crude pipeline from Abu Dhabi's onshore fields, which ends here and lets Murban crude be loaded without passing through Hormuz. The bunker market draws ships that are not loading or discharging at Fujairah at all; they stop to take fuel, stores and spares, change crew and move on.

The anchorage is where inspection opportunities arise. Ships wait off Fujairah for bunker barges, for a berth at the oil terminals, for cargo orders from charterers or for a ship-to-ship transfer, and tankers used as floating storage can stay for weeks or months when market conditions favour it. A tanker waiting for orders with clean, gas-free ballast tanks is a practical platform for a CAP gauging programme or a pre-purchase sample, and a ship that has just discharged into storage can sometimes offer cargo-tank access as well, once tanks have been washed and certified safe. Crew changes and stores deliveries at the anchorage also bring superintendents and owners' representatives on board, which makes it easier to agree the scope in person.

Fujairah's inspection demand is therefore tanker-heavy and largely afloat. Crude, product and chemical tankers and bunker barges dominate, with bulk carriers loading crushed rock and aggregates from the emirate's quarries and a smaller container and general cargo trade. Ships needing a major docking normally go to the large yards in Dubai, Bahrain or further afield, so gauging at Fujairah is often a step before docking rather than the docking itself: confirming steel renewal quantities, supporting a sale, or meeting a charterer's condition requirement while the ship is already stopped for fuel.

Where thickness measurement at Fujairah anchorage and berths takes place

Most of the work is done at anchorage. A port launch arranged by the agent carries the team, its portable ultrasonic gauges and confined-space kit out to the ship, where the crew has the tanks ready: ventilated, gas-tested, lit and with safe access to the structure to be measured. We schedule tank entry around bunkering, because bunker operations tie up the deck crew and restrict access around the manifold, and we agree a daily plan with the master so that cargo or ballast operations do not overlap gauging.

Alongside work happens at the port's general cargo and bulk berths, and occasionally at the oil terminals when a ship is idle between operations and the terminal permits it. On bulk carriers loading aggregates, holds are best gauged on arrival, empty and dry, before loading starts. Bunker barges and small tankers serving the anchorage are gauged at their lay-by berths between supply runs. For larger scopes, tanker thickness gauging in Fujairah is often carried out as pre-docking work, with the readings sent ahead to the yard that will do the steel renewal so that plate can be ordered before the ship arrives.

  • Fujairah anchorage — CAP and pre-purchase gauging on crude and product tankers waiting for bunkers, orders or berths, reached by launch through the agent
  • Floating storage tankers — gauging floating storage tankers during extended stays, concentrating on deck, ballast tanks and cargo-tank deckheads exposed to heat and inert gas
  • Oil terminal berths in the Fujairah Oil Industry Zone — limited piping and deck gauging when a ship is idle alongside and the terminal issues a permit
  • Bulk and general cargo berths — hold, tank-top and hatch-coaming gauging on bulk carriers loading aggregates, and deck checks on general cargo ships
  • Bunker barge lay-by berths — renewal and condition gauging of bunker barges and small coastal tankers that work the anchorage every day

Thickness measurement through the survey cycle at Fujairah

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 Fujairah 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.

Bunkering, scrubbers and port state control at Fujairah

Fujairah is part of the UAE's port state control system under the Riyadh MoU, and ships calling only for bunkers are as liable to inspection as those working cargo. The fuel market itself shapes inspection demand. Since 1 January 2020, when the global 0.50% sulphur cap of MARPOL Annex VI regulation 14 took effect, scrubber-fitted ships have continued to burn high-sulphur fuel oil, and Fujairah is one of the hubs where they lift it. Scrubber wash-water piping, overboard discharge lines and the shell area around the outlets are prone to rapid corrosion and erosion, so scrubber piping inspection at Fujairah fits naturally into a bunker call or a wait at anchor.

The heat matters as much as the fuel. Crude and product tankers trading in and out of the Gulf face sun-heated decks and warm seas for much of the year. Cargo-tank deckheads under hot decks see repeated condensation and attack from the sulphur compounds in inert gas and crude vapour, and ballast tanks filled with warm, saline Gulf water lose their coatings faster. Older tankers in these trades are the ones charterers and oil-major vetting ask to see a CAP rating for, typically from about 15 years, so gauging for CAP is a recurring Fujairah request alongside pre-purchase sampling.

Wherever a ship is outside a sulphur emission control area, the global 0.50% sulphur cap applies, and many of the ships calling at Fujairah 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.

Thickness gauging jobs typical of the Fujairah anchorage

Fujairah jobs are planned around a ship's time at anchor, which can change at short notice when orders arrive or a berth comes free. We agree the priority compartments with the superintendent so the most important readings are taken first, and we keep the agent informed so the launch and the team are ready when the ship is. These scenarios are typical.

  • Gauging for a CAP rating on a 16-year-old Suezmax waiting for orders: deck, bottom and side shell from inside the ballast tanks, plus sample cargo tanks after crude-oil washing and gas-freeing.
  • Pre-purchase gauging at Fujairah on an MR product tanker for a prospective buyer, sampling deck plating, cargo-tank deckheads and ballast tanks to identify substantial corrosion before the sale is agreed.
  • Scrubber overboard and wash-water piping checks on a VLCC during a bunker call, with readings concentrated around the shell penetrations and the bends where erosion is worst.
  • Pre-docking gauging on an Aframax about a month before its third renewal survey, giving the owner time to settle steel renewal with the yard while the ship is still at anchor.
  • Condition gauging of a bunker barge for its renewal survey and its operator's charter requirements, carried out at its lay-by berth between supply runs.

How a thickness measurement job runs at Fujairah

A gauging job at Fujairah runs the same way whatever the ship type. The sequence below is what the superintendent, the attending surveyor and the yard can expect from us.

There are two practical routes in. Fujairah International Airport (FJR) is close to the port but has fewer scheduled services, so teams usually fly into Dubai International (DXB) or Sharjah International (SHJ), both with frequent direct flights from India, and travel by road across the Hajar mountains to the east coast. Anchorage boarding uses a launch the agent books, together with any port entry permits; alongside work needs an ISPS gate pass in the usual way. UAE visas are processed before the team flies, and we follow the ship's ETA closely because anchorage waits can shorten without warning.

  • 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

Atlantis mobilises its inspection team from India to the vessel, for each job. There is no office or agent at the port; the team travels to the ship, which is why the planning step comes first. Work is planned and supervised by our Responsible NDT Level III, the founder, who holds ASNT NDT Level III in UT, RT, MT, PT and VT and has more than eleven years of international field experience. Technicians are qualified and certified under the company's written practice to ASNT SNT-TC-1A, and Atlantis is certified to ISO 9001 and ISO 14001.

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

  • Crude oil tankers
  • Product and chemical tankers
  • Bunker barges and coastal tankers
  • Floating storage tankers
  • Bulk carriers
  • Container and general cargo ships

Frequently asked questions

Can thickness measurement be done while the tanker is waiting at Fujairah anchorage?

Yes, provided the ship can prepare the spaces. Ballast tanks, void spaces, the deck and the pump room are usually accessible at anchor; cargo tanks must first be cleaned, gas-freed and certified for entry, and that depends on the ship's cargo plan. We agree the compartment list in advance and work through it in priority order, so a sudden departure does not leave the key areas unmeasured.

What if the ship gets orders and sails before the gauging is finished?

It happens at Fujairah. We take the readings that matter most to the survey or the buyer first, record the compartments completed each day, and hand over the partial data before the team disembarks. The rest of the scope can be completed at the ship's next port of call or in the yard, and the TM plan is set up so the two sets of readings fit together in one report.

Can scrubber lines be measured while a ship bunkers at Fujairah?

Yes. We measure wall thickness on the wash-water supply and discharge lines, the overboard piping and the areas around the shell penetration, where acidic wash water and high flow velocity cause the fastest loss. On hybrid systems that switch between open- and closed-loop modes we also check the bleed-off lines. A bunker call or anchorage wait is often long enough for a full set of readings.

Why do Gulf-trading tankers need extra attention to cargo-tank deckheads?

Deck plating in the Gulf gets very hot in the sun, and the deckhead beneath it goes through daily cycles of heating, condensation and exposure to sulphur compounds from inert gas and cargo vapour. That combination produces general wastage and pitting on deck longitudinals and plating. We include deckhead readings in Fujairah tanker programmes even when the main focus is the ballast tanks.

Does thickness measurement at Fujairah 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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