Thickness Gauging for Ships at Singapore's Anchorages and Yards

Inspection services for ships at Singapore

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

Launch piers, anchorages and yards in Singapore

Singapore gauging starts at the anchorages. The team boards by launch from the city's launch piers — typically Marina South Pier for the eastern anchorages and West Coast Pier for the western ones — as arranged by the ship's agent. A ship at anchor for bunkers or crew change can open ballast tanks and, in ballast, cargo holds; tankers can make cargo tanks available if they are gas-free. Work during bunkering follows the master's restrictions on enclosed-space entry and deck access near the manifold.

In the yards, gauging supports renewal and intermediate surveys, steel renewal, conversions and repairs, working inside the yard's permit and safety system; each yard runs its own contractor registration, so names and documents go to the yard ahead of the team. At the container terminals and the oil terminals on Jurong Island and elsewhere, berth stays are short and gauging is limited to deck, piping and accessible spaces. Port limits also matter: a ship lying outside Singapore port limits may be in a neighbouring state's waters, where boarding is arranged differently and the agent has to confirm what is allowed before the team goes out.

• Eastern and Western anchorages — pre-purchase, on-hire, off-hire and pre-docking gauging on ships calling for bunkers, crew change or stores, boarded by launch.
• Seatrium yards — renewal survey, CAP and conversion-assessment gauging on tankers, bulk carriers and gas carriers in dock and at the repair quays.
• Repair yards at Tuas and Benoi — dockings of tankers, gas carriers and container ships; docking-survey readings and pipe wall-thickness checks.
• PSA container terminals, including Tuas Port — container ships on transhipment calls; hatch coamings, deck plating and the scrubber discharge line, measured while the cranes work.
• Jurong Island oil and chemical terminals — chemical and product tankers alongside; deck structure and piping measured under the terminal's safety rules.
• Harbour bunker tankers — hull, cargo tank and cargo piping gauging on the bunker tankers serving the anchorages, during planned maintenance stops.

MPA rules, Tokyo MoU and the Singapore market

Under the Tokyo MoU, the Maritime and Port Authority of Singapore (MPA) carries out port state control, and it also runs the Singapore Registry of Ships, one of the world's largest flag registers. MPA has not allowed open-loop scrubber wash-water discharge in Singapore port waters since 1 January 2020, so scrubber-fitted ships at anchor run closed-loop, use compliant fuel or shut the scrubber down — and an idle scrubber at anchor is the easiest time to gauge its wash-water and overboard piping and inspect the shell penetrations.

The bunkering trade adds its own inspection needs. The harbour bunker tankers serving the anchorages work hard, berthing alongside ship after ship in all weather, and their hulls, cargo tanks and piping deserve regular gauging. Beyond bunkering, Singapore's position on the route between Europe, the Middle East and East Asia means owners often use a Singapore call to gather condition data: CAP gauging on an older tanker, a pre-purchase survey, or a steel estimate before a docking in a Singapore yard or further afield. Managers based here also commission gauging for ships docking across Southeast Asia and China, where consistent reporting across the fleet matters.

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

Most of the work on a Singapore job happens before the team boards: scope, plan and access are settled first, so the time on board goes on measurement.

The team arrives through Singapore Changi Airport. Launches for the anchorages leave from Marina South Pier or West Coast Pier, depending on where the ship lies, and are booked by the agent; PSA terminals and the repair yards each issue their own passes, applied for through the agent or the yard. Indian passport holders need a visa for Singapore, and any work-pass requirement for an assignment is confirmed before travel, so the paperwork starts as soon as the anchorage window or dock date is known. Ships lying outside port limits may need different boarding arrangements, which the agent confirms.

• 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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