Santa Cruz de Tenerife: Ultrasonic Thickness Gauging for Ships Crossing the Atlantic

Inspection services for ships at Santa Cruz de Tenerife

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

Cruise piers, ferry berths and fuel quays used for gauging

Most gauging in Santa Cruz is done afloat. At the cruise piers, access depends on the engine and deck departments, who can open void spaces, sea-water pump rooms and the scrubber installation while the ship is alongside. Ferries in the inter-island trade are measured between rotations or during winter maintenance stops, with readings on car decks, ramps, stern doors and ballast tanks. Because the same ships return to the same berths, a larger scope can be split across several calls and compiled into a single report.

At the fuel berths, tanker work is limited by cargo operations and the terminal's permit rules. Deck plating, deck piping and segregated ballast tanks released by the chief officer can be gauged during discharge, while cargo tank interiors need a gas-free certificate and are better done in a yard stay. For a ship that needs real yard work, the practical route is a docking elsewhere in the Canaries or on the mainland, and the Tenerife readings are used to pick the yard and set the steel allowance. Ships waiting in the roadstead can be reached by launch through the agent, though north-easterly swell sometimes limits boarding, so a spare day is sensible.

• Cruise piers on the city waterfront: scrubber wash-water, overboard and sea-water piping gauged on turnaround days
• Inter-island ferry berths: car deck, ramp, stern door and ballast tank readings between rotations or in winter maintenance stops
• Fuel terminal berths: deck, deck piping and released ballast tanks on product tankers during discharge
• Commercial quays for containers and ro-ro cargo: limited-scope gauging of hatch covers, ballast tanks and piping during cargo work
• Roadstead off the port: pre-purchase and charter condition gauging by launch, subject to swell
• Docking elsewhere in the Canaries or on the mainland: readings from Tenerife passed to the yard as a steel renewal estimate

Canary Islands regulation and the Atlantic trades

The Canary Islands belong to Spain and the EU, so Santa Cruz applies Spanish port state control under the Paris MoU, administered through the Capitanía Marítima for the Dirección General de la Marina Mercante. The waters around the archipelago lie outside the sulphur emission control areas, so ships on passage meet the global limit through compliant fuel or a scrubber, while the EU's in-port sulphur rule applies alongside. EU carbon rules reach here as well: shipping has been inside the Emissions Trading System since 2024 and FuelEU Maritime has applied since 2025, which affects cruise and ferry operators weighing the future of older ships.

Many ships using the port are working between Europe and the tropics. Cruise lines position ships across the Atlantic in autumn and spring, and offshore support vessels move between the North Sea or Mediterranean and West African operations. Each leg exposes structure to different conditions, and owners often want a measured baseline at the crossing point. Under the EU Ship Recycling Regulation, ships calling at EU ports need an Inventory of Hazardous Materials, and a clear record of structural condition helps owners plan the end of a ship's life. For managers, a gauging report from Tenerife can support a docking decision, a sale or a charter negotiation, and it arrives while the ship is still in the middle of her itinerary.

Wherever a ship is outside a sulphur emission control area, the global 0.50% sulphur cap applies, and many of the ships calling at Santa Cruz de Tenerife 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 Santa Cruz de Tenerife

A gauging job at Santa Cruz de Tenerife 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.

Tenerife has two airports, and Tenerife North, also known as Los Rodeos, is the closer one to the city; Tenerife South is the larger international gateway. Technicians from India normally connect through Madrid or another European hub. The islands form part of the Schengen area, so Schengen visas are needed and travel is fixed once they are issued. Cruise and ferry berths, ISPS passes and launches for the roadstead are arranged through the ship's agent.

• 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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