Banjul Port · GMBJL

Propeller Polishing at Banjul Port

Mirror finish, measurably lower fuel burn

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Tell us the vessel, the port and the window. Scoped reply, usually the same working day.

Cleanship Marine carries out underwater propeller super polishing at Banjul Port, Banjul. Divers work the blades through a multi-stage sequence to a Class A mirror finish, removing fouling, calcareous deposits and accumulated surface roughness while the vessel lies alongside or at anchor.

The propeller is the highest-leverage surface on any vessel calling at Banjul: it runs at high relative velocity, so roughness there costs disproportionately more than the same roughness spread over the hull. For the feeder container ships, general cargo ships and banjul–barra ferries working this port, polishing is the shortest route to a measurable fuel saving.

Vessels bound for Banjul cross a sand bar in the entrance channel, often on the flood tide with limited water under the keel, and they work in estuary water full of sand and silt. Both wear on a propeller: suspended sand is mildly abrasive, and a propeller turning close to the bottom can pick up damage at the blade edges. A polish at Banjul is therefore also a careful inspection of both faces, the edges and the tips, with anything found photographed and reported.

What it gets you

Blade roughness removed where it costs the most, at the highest-velocity surface on the vessel
Propeller efficiency restored between dockings without off-hire
Cavitation erosion and edge damage documented before it becomes a repair item
A finish record that supports hull and propeller performance monitoring

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

Blade condition assessment covering both faces, the leading and trailing edges and the tips
Multi-stage polishing sequence worked down to a Class A mirror finish
Boss, hub and fairing cone cleaned, with rope guard and seal area inspected
Edge damage, cavitation erosion and any deformation photographed and reported rather than polished over
Diving permission cleared with Gambia Ports Authority, and the shaft confirmed immobilised with the master before the dive
Before-and-after video and a written finish record for the performance file

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 propeller polishing attendance, wherever the vessel is. Anything outside it is quoted separately and flagged before mobilisation, never added afterwards.

Deposit removal: Calcareous growth, shell and hard deposits removed from both blade faces without gouging or scoring the blade surface.
Progressive polishing: Successive abrasive grades work the blade from rough to fine, finishing at a Class A mirror surface across the full blade area.
Edge finishing: Leading and trailing edges dressed to restore profile and remove the roughness that seeds cavitation.
Boss and hub: Boss, hub and rope guard cleaned, with stern tube seal condition inspected and reported.

Full Propeller Polishing service details

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 propeller polishing 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 — Propeller Polishing at Banjul

Do you provide propeller polishing 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.

Do you check for damage when polishing a propeller at Banjul?

Always. Vessels cross the sand bar in the entrance channel, often with little water under the keel, and the estuary water carries sand and silt. We inspect the blade edges, tips and both faces during the polish, and report any damage rather than polishing over it.

Can propeller polishing 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 propeller polishing 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 propeller polishing 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.

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