Underwater Hull Cleaning at Colombo Port
Full hull cleaned in the water, vessel stays on hire
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Tell us the vessel, the port and the window. Scoped reply, usually the same working day.
Cleanship Marine provides underwater hull cleaning at Colombo Port, Western Province, working the container terminal berths and bunkering anchorage. Commercial dive teams remove slime, weed and shell growth from the vertical sides, flat bottom, bilge keels, sea chests and niche areas with the vessel afloat and on hire — no dry dock, no diversion, no off-hire.
Colombo is South Asia's largest transhipment hub and one of the busiest bunkering ports on the Europe–Asia route, handling main-line container tonnage that would not otherwise call in the region. Cleanship keeps an office here, and the port sits directly on the rotation for vessels working the Indian coverage.
What it gets you
- Hydrodynamic smoothness restored before fouling reaches the calcareous stage that damages coating
- Fuel and emissions penalty from drag reduced without taking the vessel off hire
- Documented condition record for the technical file and the next docking specification
- Sea chests and inlets cleared, protecting cooling water flow
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
- Pre-clean fouling survey to establish coverage, growth type and coating condition before any tool touches the hull
- Brush cart cleaning of the flat bottom and vertical sides, with brush hardness selected against your antifouling specification
- Hand cleaning of bilge keels, rudder, stern frame, thruster tunnels, anodes and the niches a cart cannot follow
- Sea chest gratings and inlet openings cleared of growth and debris to restore cooling water flow
- Diving permission cleared with Sri Lanka Ports Authority and the terminal before mobilisation
- Before-and-after video and stills, with a written report on coating condition and anode wastage
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 underwater hull cleaning attendance, wherever the vessel is. Anything outside it is quoted separately and flagged before mobilisation, never added afterwards.
- Fouling survey
- A pre-clean dive establishes fouling type, coverage and severity, and confirms coating condition so the correct tooling is selected.
- Flat bottom and vertical sides
- Brush cart cleaning of large areas, removing slime, weed and shell growth to restore surface smoothness.
- Niche areas
- Hand cleaning of bilge keels, bow thruster tunnels, rudder, stern frame, anodes and other niche areas where fouling concentrates.
- Sea chests and gratings
- Sea chest gratings and inlet openings cleared of growth and debris to restore cooling water flow.
- Documentation
- Underwater video and stills before and after, with a written report covering coating condition and anode wastage.
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 underwater hull cleaning 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 — Underwater Hull Cleaning at Colombo
Do you provide underwater hull cleaning 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 underwater hull cleaning 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 underwater hull cleaning 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 underwater hull cleaning 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.
Underwater Hull Cleaning 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.