Thickness Measurement for Ships at Falmouth Docks and Anchorages

Inspection services for ships at Falmouth

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

Where gauging is done in and around Falmouth

Hull gauging at anchor in Falmouth Bay is launch work. The ship's agent books the launch, the team boards by pilot or accommodation ladder in the lee of the ship, and work stops if the weather turns. The bay is sheltered from the west but more open to easterly and south-easterly winds, so the agent's local knowledge matters when choosing the day, and the scope is ordered so that the most important readings are taken first. Gauges, couplant and probes go up the ladder in a bag, so the kit is chosen for the scope before the launch leaves.

In the docks, a ship on a repair contract has the yard's services, staging and lighting, and the team works to the yard's programme beside the class surveyor. For laid-up ships on the river moorings, access is again by launch, but tanks can be emptied and ventilated over days rather than hours, so a complete condition survey ahead of reactivation or sale is realistic. Ship repair in Falmouth and gauging are closely linked: readings taken at anchor on one call often become the steel list for a docking here on the next.

• Falmouth Bay anchorage — targeted deck, air-pipe and tank gauging on ships calling for bunkers or stores, reached by launch through the ship's agent.
• Falmouth Docks drydocks — double bottoms, shell and tanks gauged while the ship is dry, so the class surveyor and yard can agree renewal before the dock is flooded.
• Falmouth Docks repair quays — afloat repair periods for piping, deck and tank work, where gauging confirms which pipe runs and plates need renewal.
• Carrick Roads and River Fal moorings — condition surveys on laid-up ships before reactivation, sale or a return to service, with time to open tanks in sequence.
• Ships waiting for orders in the bay — pre-purchase and on-hire condition gauging arranged at short notice with the brokers and the agent.

Sulphur boundaries, port state control and the Western Approaches

Falmouth lies on the western edge of the North Sea and English Channel SOx Emission Control Area, whose Channel boundary runs along longitude 5°W close to the harbour entrance, so fuel changeover is part of the routine for ships passing here. Once a ship has been at berth in the harbour for two hours, the UK's at-berth rule requires 0.10% sulphur fuel whatever the ECA boundary says. From 1 September 2028 the North-East Atlantic ECA, adopted by the IMO in 2026, extends the 0.10% limit to the waters west of the UK as well, which closes the gap at the Channel's western end and changes the fuel and scrubber decisions owners make about this route.

Port state control at Falmouth is carried out by the Maritime and Coastguard Agency; the UK kept its place in the Paris MoU after Brexit while applying PSC through domestic law. The ships stopping here are mostly deep-sea tankers, bulk carriers and cargo ships under a wide range of flags and managers, which is why so much of the gauging is commissioned by superintendents in Greece, Germany, Singapore or elsewhere who need a reliable set of readings from a ship they cannot visit themselves. For them, a bunker stop is an opportunity rather than an interruption, and a ship already planning a Falmouth Docks visit can be gauged before she arrives.

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

How a thickness measurement job runs at Falmouth

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

The team usually flies into Heathrow or Gatwick and continues by rail or road to Cornwall; Cornwall Airport Newquay and Exeter Airport are closer alternatives with domestic and some European connections. Falmouth Docks has controlled gates for which the yard issues passes, while anchorage and river work depends on launches booked by the ship's agent with the harbour's local launch operators. Teams travel from India on UK visas, and because bunker calls can be fixed at short notice, owners who expect to use Falmouth regularly benefit from having the team's visas in place before a specific job arises.

• 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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