Thruster Cleaning & Polishing at Banjul 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 Banjul Port, Banjul. 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. Growth builds on the tunnel walls, blades and gratings without anyone noticing until manoeuvring performance drops, and at Banjul — The Gambia's only seaport, at the mouth of a tidal river — that tends to show at exactly the moment the thrust is needed.
The Banjul–Barra ferries cross the mouth of the Gambia River many times a day and berth across a strong tidal stream at both ends of the crossing. That is the hardest thruster work on this coast, and a thruster tunnel fouled by the warm, nutrient-rich estuary water gives up exactly the thrust needed to hold a ferry against the current. Cleaning is fitted between crossings, at slack water, with the thruster isolated first.
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 Banjul
Banjul sits at the mouth of the Gambia River, and the water at its berths is estuary water: tidal, fast-flowing on the ebb and flood, and carrying sediment down from a river that drains a large part of West Africa. A sand bar in the entrance channel limits vessels to about a 9-metre draft, and the deepest-drafted ships time their passage to the flood tide. For in-water work that means two things — dives are timed to slack water, and visibility at the berths is low enough that divers work by touch under surface supervision.
- Where we work
- Banjul Wharf · New Banjul Jetty and container berths · Fisheries jetty · Banjul–Barra ferry terminal
- Vessels we see here
- Feeder container ships · General cargo ships · Banjul–Barra ferries · Fishing vessels · Small cruise ships
What we do at Banjul
- 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 Gambia Ports Authority, 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 Banjul
The combination of Atlantic swell and rain governs the calendar at Banjul Port, with the heaviest rain from May to October and swell running year-round. The swell here is long-period Atlantic ground swell rather than wind-driven sea, so it reaches the anchorages on days that look calm from the bridge and it is the single biggest cause of a lost in-water window on this coast. The tidal stream and the silt load govern the method here: the working window is slack water, not the working day, and the operation is planned by feel and surface supervision with video kept as the record rather than as the diver's means of navigation.
Work is taken at the Banjul Wharf, New Banjul Jetty and container berths, fisheries jetty, Banjul–Barra ferry terminal, and which of those a vessel ends up at changes the dive plan more than the season does. Teams mobilise via Banjul (BJL), 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 Banjul
Container tonnage on a fixed rotation shows the familiar pattern: light slime over most of the vertical sides, with the real accumulation in the flat bottom, the bilge keels and the niches where flow is slowest. Those are the areas that cost fuel and the ones a quick clean tends to skip.
Silt settles over the growth on the flat bottom and in the niches, which masks the true fouling state until the divers are actually on it. That is why the pre-clean survey here is a real step rather than a formality.
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 Banjul
- 1
Scope and vessel details
Tell us the vessel, her particulars, the coating specification and the window at Banjul. 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
Gambia Ports Authority approves the work alongside the local harbour master, and at a state port that conversation is quicker but less formal — it is worth having in writing. 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 Banjul
Divers, compressors, brush carts and cameras mobilise via Banjul (BJL). Where a vessel is also calling at Gambia River, 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.
Banjul Port at a glance
- UN/LOCODE
- GMBJL
- Port type
- State Port
- State
- Banjul
- Country
- The Gambia
- Water body
- Gambia River estuary
- Port authority
- Gambia Ports Authority
- Main cargoes
- Containers, Rice, sugar and flour, Cement and general cargo, Fuel, Fishing catch
- Crew mobilisation
- Banjul (BJL)
- Services here
- Hull Cleaning
Frequently asked — Thruster Cleaning at Banjul
Do you provide thruster cleaning at Banjul Port?
Yes. Cleanship Marine works Banjul Port (GMBJL) in Banjul, The Gambia, covering the Banjul Wharf, New Banjul Jetty and container berths, fisheries jetty, Banjul–Barra ferry terminal. Teams mobilise via Banjul (BJL) with the full spread.
Can a Banjul–Barra ferry's thruster be cleaned without stopping the service?
We plan it between crossings or during a scheduled stand-down, at slack water, so the crossing is interrupted as little as possible. The thruster is isolated and tagged out with the master before the dive.
Can thruster cleaning be done while the vessel works cargo at Banjul?
Usually yes, but the tide sets the schedule rather than the cargo plan. The practical question is how many slack windows fall inside the vessel's stay, not what the holds are doing. The vessel stays on hire throughout, and there is no diversion and no dry dock. We scope against the conditions at Banjul and tell you honestly whether the window you have is enough.
Do you need a diving permit from Gambia Ports Authority?
Yes, and we obtain it. Diving permission from Gambia 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 Banjul?
Visibility at Banjul Port is habitually very low, and often close to nil at the turn, and the combination of Atlantic swell and rain 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 Banjul?
Feeder container ships, General cargo ships, Banjul–Barra ferries, Fishing vessels and Small cruise ships — the traffic at Banjul Port runs to containers, rice, sugar and flour, cement and 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 Banjul?
Divers and equipment mobilise via Banjul (BJL). 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 Gambia River or Dakar, one mobilisation is often sized to cover both.
What does thruster cleaning at Banjul cost?
It depends on the vessel's dimensions and wetted area, the fouling state found, the coating specification and the working window available at Banjul. 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 Banjul and you get a scoped price, usually the same working day.
Thruster Cleaning & Polishing at Banjul Port.
Tell us the vessel, her ETA at Banjul and the window. You get a scope, a crew size and an honest duration — usually the same working day.