In-Water Class Survey at Colombo Port
Class attendance without opening a dry dock
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Tell us the vessel, the port and the window. Scoped reply, usually the same working day.
Cleanship Marine delivers class-approved in-water surveys at Colombo Port, Western Province, with high-definition live video to a surface monitoring station, diver-to-surveyor communications and a full report package for the class file.
Classification societies accept in-water survey in place of drydocking for many vessels and inspection scopes, provided the work is done by an approved diving contractor to a defined procedure with the surveyor able to see the structure in real time. Shelter is on your side here — the vessel is stable and the dive is uninterrupted — but basin silt means the lighting and camera plan has to be agreed with the surveyor before the class attendance is booked, not improvised on the day.
What it gets you
- Survey requirement satisfied without opening a dry dock or taking the vessel off hire
- Surveyor sees the structure live rather than reviewing a recording after the fact
- Defects located precisely against hull reference marks, not described approximately
- A report package built for the class file, not a video dump
Working conditions at Colombo
Colombo works behind long breakwaters and is well sheltered, so alongside work runs year-round and the south-west monsoon from May to September governs the anchorage rather than the berth. The bunkering anchorage carries a standing population of vessels waiting for fuel or orders, which is where most in-water work here actually happens. Harbour water is warm and turbid with moderate visibility; fouling returns fast.
- Where we work
- Container terminal berths · Bunkering anchorage · General cargo quays
- Vessels we see here
- Main-line and feeder container ships · Bunker tankers and barges · General cargo ships · Cruise ships
What we do at Colombo
- Survey programme agreed in advance with the class society and the surveyor attending at Colombo
- Hull plating, welds, sea chests, rudder, propeller and stern gear inspected to the agreed scope
- Live high-definition video to the surface station with two-way diver-to-surveyor communications
- Hull markings and reference points confirmed so the surveyor can locate every feature precisely
- Diving permission and any environmental clearance cleared with Sri Lanka Ports Authority
- Full report package with video, stills and findings issued for the class file
Planning the window at Colombo
The two monsoons governs the calendar at Colombo Port, the south-west from May to September and the north-east from December to February. Which one matters depends on which coast the port is on — the south-west monsoon closes the western and southern anchorages while the east coast stays workable, and the north-east monsoon reverses it. Sri Lanka is the one market on the coverage list where there is almost always a workable coast. Because the harbour is sheltered, work here normally runs alongside or at a protected anchorage and can proceed in parallel with cargo operations rather than competing with them for the berth window.
Work is taken at the container terminal berths, bunkering anchorage and general cargo quays, and which of those a vessel ends up at changes the dive plan more than the season does. Cleanship holds an operating base at Colombo, so we can hold a team ready against a shifting ETA rather than committing travel to a date that may move.
What we typically find at Colombo
Liquid and gas tonnage here spends long stretches at the terminal or waiting for a slot, so growth tends to be even and well established across the hull rather than patchy — heavier than the trading pattern suggests, and further along than a speed report alone would indicate.
Shelter is a mixed blessing for a hull. The same calm that makes the port easy to work in is still water, and still water grows fouling faster than an exposed berth does.
Standard scope of work
Included as standard on every in-water class survey attendance, wherever the vessel is. Anything outside it is quoted separately and flagged before mobilisation, never added afterwards.
- Hull structure inspection
- Shell plating, welds, bilge keels and openings inspected with continuous video and commentary, with cleaning of areas as needed for meaningful viewing.
- Rudder and steering gear
- Rudder plating, pintles, bearings and clearances inspected and, where required, measured.
- Propeller and stern arrangement
- Propeller, boss, rope guard and stern tube seal inspected for damage, erosion and leakage.
- Sea chests and openings
- Sea chests, gratings, valves and overboard discharges inspected and recorded.
- Anodes and coating
- Sacrificial anode wastage assessed and coating condition mapped for planning the next dry docking.
How we deliver it at Colombo
- 1
Scope and vessel details
Tell us the vessel, her particulars, the coating specification and the window at Colombo. We come back with a defined scope, a crew size and a duration we will stand behind. Where the conditions here will not support what has been asked for, we say so at this stage rather than after mobilisation.
- 2
Permits and approvals
Sri Lanka Ports Authority runs a statutory permit process here, so the lead time is real and the application goes in early rather than on arrival. Diving permission, terminal approval and any environmental clearance for in-water work are handled by us, not left with the agent to chase.
- 3
Mobilisation to Colombo
Cleanship holds an operating base at Colombo, so divers, compressors, brush carts and cameras are on the ground rather than in transit. That is the difference between meeting a window and missing it.
- 4
Safety setup and the dive
The vessel is secured for diving — main engine, shaft and thrusters immobilised, sea suctions confirmed shut, permit agreed with the master. Teams work under surface supervision with continuous diver communications and video throughout.
- 5
Report and handover
A completion report covering in-water class survey is issued with before-and-after imagery, coating and anode condition and anything found that you should know about. The findings are discussed with the vessel rather than emailed and forgotten.
Colombo Port at a glance
- UN/LOCODE
- LKCMB
- Port type
- Major Port
- State
- Western Province
- Country
- Sri Lanka
- Water body
- Indian Ocean
- Port authority
- Sri Lanka Ports Authority
- Main cargoes
- Containers and transhipment, Bunkers, General cargo, Cement and dry bulk, Tea and agricultural cargo
- Crew mobilisation
- Colombo (CMB)
- Services here
- Hull Cleaning, Hold Cleaning and Tank Cleaning
Frequently asked — In-Water Survey at Colombo
Do you provide in-water class survey at Colombo Port?
Yes. Cleanship Marine works Colombo Port (LKCMB) in Western Province, Sri Lanka, covering the container terminal berths, bunkering anchorage and general cargo quays. We hold an operating base at Colombo, so people and equipment are held locally rather than mobilised against a window.
Can in-water class survey be done while the vessel works cargo at Colombo?
Yes, in most cases. The harbour is sheltered enough that divers work alongside while cargo operations continue, and neither holds the other up. The vessel stays on hire throughout, and there is no diversion and no dry dock. We scope against the conditions at Colombo and tell you honestly whether the window you have is enough.
Do you need a diving permit from Sri Lanka Ports Authority?
Yes, and we obtain it. Diving permission from Sri Lanka Ports Authority, terminal approval where the berth requires it, and any environmental clearance for in-water work are arranged as part of the job rather than left with the agent. The master's permit to work and the immobilisation of machinery are agreed on board before anyone enters the water.
What is underwater visibility like at Colombo?
Visibility at Colombo Port is moderate, and it drops further around active bulk handling and after heavy rain, and the two monsoons sets the outer limits of the calendar. How the tide and sea state shape the dive plan is set out in full in the working-conditions section on this page.
Which vessels do you carry out in-water class survey on at Colombo?
Main-line and feeder container ships, Bunker tankers and barges, General cargo ships, Cruise ships — the traffic at Colombo Port runs to containers and transhipment, bunkers, general cargo, so those are the profiles we see most. The scope is sized to the vessel, not to a standard package.
How quickly can a team mobilise to Colombo?
Cleanship keeps an operating base at Colombo, so response here is fast — the constraint is normally the approvals and the working window rather than getting divers and equipment to the port.
What does in-water class survey at Colombo cost?
It depends on the vessel's dimensions and wetted area, the fouling state found, the coating specification and the working window available at Colombo. We would rather scope it properly and give you a specific figure than quote a headline rate that changes once the work starts. Send the details and the window at Colombo and you get a scoped price, usually the same working day.
In-Water Class Survey at Colombo Port.
Tell us the vessel, her ETA at Colombo and the window. You get a scope, a crew size and an honest duration — usually the same working day.