Ship Hull Gauging and Thickness Measurement in Riga

Inspection services for ships at Riga

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

Where ships are gauged in Riga

Almost all gauging in Riga is done alongside the river terminals or at the anchorage. Because terminals are spread over a long stretch of river on both banks, the team plans each day around one ship rather than moving between berths, and the agent arranges ISPS passes terminal by terminal. Bulk and timber ships are gauged hold by hold as cargo operations allow, starting with the holds that will be loaded last. Container feeders are measured during their scheduled calls, which are shorter, so their scopes are tighter and prepared in advance with the ship's officers.

Ships that will dock elsewhere in the Baltic after leaving Riga benefit from pre-docking gauging here. Measured renewal figures let the owner place the docking with a firm steel list and compare yard offers on the same basis. For ships at the roads anchorage, a launch takes the team out; work there is limited to deck, piping and gas-freed ballast tanks, and depends on weather and, in hard winters, ice. Ultrasonic thickness measurement in Riga is often the first job on a Baltic round.

• Bulk and timber terminals on the lower Daugava — bulk carriers and general cargo ships; hold frames, hopper plating and tank tops gauged between loading stages
• Riga container terminals — feeder ships on Baltic and North Sea loops; deck, hatch-coaming and ballast-tank gauging during their calls
• Liquid bulk berths — product tankers; deck plating and cargo and ballast piping gauged under the ship's and terminal's permit systems
• Wood pellet and chip berths — bulk carriers loading biomass; hold and adjacent-space gauging only after ventilation and gas testing
• Riga roads anchorage — ships lying off the river mouth until a berth frees up; the agent arranges a launch for the team

Latvian regulation, ice and trade context for Riga

Latvia is a Paris MoU state. Fuel burned in the Gulf of Riga, as everywhere in the Baltic, is capped at 0.10% sulphur under the SECA rules. Bulk carriers and feeders calling at Riga include ships fitted with exhaust gas scrubbers, whose discharge lines, and the shell connection where they leave the ship, need gauging as part of routine maintenance. Since 2024 the EU ETS has counted all emissions on voyages between Riga and other EU ports and half of those on voyages from outside the EU, and FuelEU Maritime has applied since 2025; both raise the stakes when an owner decides whether an older bulk carrier is worth renewing.

Bulk carriers calling at Riga are surveyed under the IACS ESP rules, UR Z10.2 for single-skin and Z10.5 for double-skin ships, with the gauging of cargo holds, double bottoms and the hopper and topside tanks growing at each renewal survey. Ships around their third renewal survey and beyond face the heaviest gauging. Ice is the seasonal factor: the Gulf of Riga does not freeze every winter, but in hard ones the Latvian authorities set ice-class restrictions for the port and icebreakers escort ships into the river. Bulk carrier thickness measurement in Riga is usually timed to the loading programme and, in winter, to the ice.

Ships trading to Riga are inside a sulphur emission control area, where fuel must not exceed 0.10% sulphur unless an exhaust gas cleaning system (scrubber) is fitted. Scrubber wash-water piping, the overboard discharge and the hull penetration around it are among the fastest-corroding parts of a modern ship, so they belong in the gauging scope at every docking and, on open-loop systems, between dockings.

How a thickness measurement job runs at Riga

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

The team lands at Riga International Airport, which lies close to the city and the river terminals. Terminal gate passes under the ISPS Code are requested through the ship's agent, and for ships at the Riga roads the agent also arranges a launch. Latvia is part of the Schengen area, so our technicians from India travel on a Schengen visa and we set the job date once the loading programme or docking slot is firm. Riga is also a convenient start point for jobs further along the coast at Ventspils, Liepāja or Klaipėda.

• 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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