Thruster Cleaning & Polishing at Yanbu Port
Full thrust restored when you need it most
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Tell us the vessel, the port and the window. Scoped reply, usually the same working day.
Cleanship Marine cleans and polishes bow and stern thrusters at Yanbu Port, Al Madinah Province. Divers clear the full tunnel bore, polish the blades and hub, and clear the gratings, restoring the manoeuvring thrust that quietly disappears while a vessel sits idle.
Thruster tunnels are the worst fouling trap on a hull — sheltered, still and almost never inspected. That matters more than usual at Yanbu, where Saudi Arabia's Red Sea crude and petrochemical export terminal keeps vessels stationary in warm water for extended periods and growth builds on tunnel walls, blades and gratings until manoeuvring performance is noticeably down at exactly the moment it is needed.
What it gets you
- Manoeuvring thrust restored ahead of a berthing or a pilotage that needs it
- Tunnel and grating flow cleared, not just the visible blade faces
- Seal, boss and anode condition documented while the divers are already down
- Reduced reliance on tug assistance where thrust had quietly degraded
Working conditions at Yanbu
Yanbu is a refinery and petrochemical export complex with dedicated loading berths, so the constraint is the terminal rather than the weather and the permit chain runs through the Royal Commission as well as the port. Access is controlled and the lead time is real. The Red Sea here is warm, hypersaline and clear enough for usable inspection video — unusual for an industrial port and worth taking advantage of when the berth allows.
- Where we work
- Crude loading berths · Product jetties · Sulphur berth
- Vessels we see here
- VLCC and Suezmax crude tankers · Product and chemical tankers · LPG carriers · Bulk carriers
What we do at Yanbu
- Full tunnel bore cleaned end to end, both openings, including the areas behind the gratings
- Blade and hub polished, with seal and boss condition inspected and reported
- Tunnel gratings cleared of growth and debris so flow is restored, not just the visible face
- Anodes inside the tunnel checked and wastage recorded
- Diving permission cleared with Mawani and the Royal Commission for Yanbu, with the thruster confirmed isolated and tagged out before the dive
- Video record of tunnel and blade condition before and after
Planning the window at Yanbu
The northerly Red Sea wind governs the calendar at Yanbu Port, strongest through the winter and spring. The Red Sea runs a persistent along-axis wind that builds a short chop at the anchorages while the berths stay workable, so the constraint here is almost always the anchorage rather than the season. 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 crude loading berths, product jetties and sulphur berth, and which of those a vessel ends up at changes the dive plan more than the season does. Teams mobilise via Yanbu (YNB) or Jeddah (JED), so give us the ETA as early as you have it — the travel is the flexible part, the approvals and the working window are not.
What we typically find at Yanbu
Dry bulk handling here puts cargo dust into the water around the berths and anchorage. It settles on horizontal surfaces and packs into sea chest gratings and inlet openings, so inlet and grating clearance is routinely a larger part of the job at Yanbu than owners budget for.
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 thruster cleaning attendance, wherever the vessel is. Anything outside it is quoted separately and flagged before mobilisation, never added afterwards.
- Tunnel cleaning
- Fouling removed from the full length of the tunnel bore, including the areas behind gratings where growth is heaviest.
- Blade cleaning and polishing
- Propeller blades and hub cleaned and polished to restore surface finish and reduce cavitation-inducing roughness.
- Grating and guard clearance
- Gratings and rope guards cleared of growth, netting and debris that restrict flow or risk fouling the unit.
- Condition inspection
- Blade edges, seals and visible gearcase condition inspected and recorded, with any damage reported immediately.
How we deliver it at Yanbu
- 1
Scope and vessel details
Tell us the vessel, her particulars, the coating specification and the window at Yanbu. 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
Access at Yanbu Port is the terminal operator's decision as much as Mawani and the Royal Commission for Yanbu's, so both are in the approval chain from the start — a berth-side refusal discovered at the gangway costs the whole attendance. 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 Yanbu
Divers, compressors, brush carts and cameras mobilise via Yanbu (YNB) or Jeddah (JED). Where a vessel is also calling at Jeddah, one mobilisation is normally sized to cover both.
- 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 thruster 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.
Yanbu Port at a glance
- UN/LOCODE
- SAYBI
- Port type
- Private Port
- State
- Al Madinah Province
- Country
- Saudi Arabia
- Water body
- Red Sea
- Port authority
- Mawani and the Royal Commission for Yanbu
- Main cargoes
- Crude oil, Refined products, Petrochemicals, LPG, Sulphur
- Crew mobilisation
- Yanbu (YNB) / Jeddah (JED)
- Services here
- Hull Cleaning, Hold Cleaning and Tank Cleaning
Frequently asked — Thruster Cleaning at Yanbu
Do you provide thruster cleaning at Yanbu Port?
Yes. Cleanship Marine works Yanbu Port (SAYBI) in Al Madinah Province, Saudi Arabia, covering the crude loading berths, product jetties and sulphur berth. Teams mobilise via Yanbu (YNB) or Jeddah (JED) with the full spread.
Can thruster cleaning be done while the vessel works cargo at Yanbu?
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 Yanbu and tell you honestly whether the window you have is enough.
Do you need a diving permit from Mawani and the Royal Commission for Yanbu?
Yes, and we obtain it. Diving permission from Mawani and the Royal Commission for Yanbu, 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 Yanbu?
Visibility at Yanbu Port is moderate, and it drops further around active bulk handling and after heavy rain, and the northerly Red Sea wind 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 thruster cleaning on at Yanbu?
VLCC and Suezmax crude tankers, Product and chemical tankers, LPG carriers, Bulk carriers — the traffic at Yanbu Port runs to crude oil, refined products and petrochemicals, 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 Yanbu?
Divers and equipment mobilise via Yanbu (YNB) or Jeddah (JED). Give us the ETA and the window and we will confirm what is achievable rather than promise a date we cannot hold. Where the vessel also calls at Jeddah or King Abdullah Port, one mobilisation is often sized to cover both.
What does thruster cleaning at Yanbu cost?
It depends on the vessel's dimensions and wetted area, the fouling state found, the coating specification and the working window available at Yanbu. 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 Yanbu and you get a scoped price, usually the same working day.
Thruster Cleaning & Polishing at Yanbu Port.
Tell us the vessel, her ETA at Yanbu and the window. You get a scope, a crew size and an honest duration — usually the same working day.