Freetown Port · SLFNA

Propeller Polishing at Freetown 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 Freetown Port, Western Area. 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 Freetown: 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 and break-bulk ships, product tankers working this port, polishing is the shortest route to a measurable fuel saving.

Container feeders on fixed West African rotations call Freetown regularly, and a propeller polish fitted into the anchorage wait or the berth window is the cheapest fuel saving available on a long coastal rotation. The polish is done blade by blade with diver-held tools, and the rope guard is checked for fishing line and net, which the Freetown fishing fleet leaves in the harbour.

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 Freetown

Freetown sits on the south side of the Sierra Leone River estuary, one of the largest natural harbours on the African coast, and the quay is sheltered from the Atlantic swell that works the open coast to either side. What it is not sheltered from is the rain: Freetown is one of the wettest capitals in West Africa, and from roughly May to October the river carries run-off into the harbour, cutting visibility at the berths and stopping deck work in the heaviest downpours. Warm estuary water and long berth waits build fouling steadily.

Where we work: Container terminal (berths 3–6) · Bulk and break-bulk berths · Kissy Oil Terminal · Inner harbour anchorage
Vessels we see here: Feeder container ships · General cargo and break-bulk ships · Product tankers · Fishing vessels · Freetown–Lungi ferries

What we do at Freetown

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 Sierra Leone 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 Freetown

The combination of Atlantic swell and rain governs the calendar at Freetown 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. 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 3–6), bulk and break-bulk berths, Kissy Oil Terminal, inner harbour anchorage, and which of those a vessel ends up at changes the dive plan more than the season does. Teams mobilise via Freetown Lungi (FNA), 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 Freetown

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.

Vessels calling Freetown often wait for a berth in warm, nutrient-rich estuary water, so the flat bottom and sea chests pick up steady barnacle and weed growth, heavier after the rainy season. Fishing vessels based in the harbour, which lie idle between trips, carry the heaviest fouling we see here.

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 Freetown

1
Scope and vessel details
Tell us the vessel, her particulars, the coating specification and the window at Freetown. 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
Sierra Leone 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 Freetown
Divers, compressors, brush carts and cameras mobilise via Freetown Lungi (FNA). Where a vessel is also calling at Pepel, 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.

Freetown Port at a glance

UN/LOCODE: SLFNA
Port type: State Port
State: Western Area
Country: Sierra Leone
Water body: Sierra Leone River estuary
Port authority: Sierra Leone Ports Authority
Main cargoes: Containers, Rice and bagged general cargo, Break-bulk and project cargo, Fuel, Fishing catch
Crew mobilisation: Freetown Lungi (FNA)
Services here: Hull Cleaning and Hold Cleaning

Frequently asked — Propeller Polishing at Freetown

Do you provide propeller polishing at Freetown Port?

Yes. Cleanship Marine works Freetown Port (SLFNA) in Western Area, Sierra Leone, covering the container terminal (berths 3–6), bulk and break-bulk berths, Kissy Oil Terminal, inner harbour anchorage. Teams mobilise via Freetown Lungi (FNA) with the full spread.

Why check the rope guard when polishing a propeller at Freetown?

Freetown has a large fishing fleet, and lost line and net in the harbour can wrap around the shaft. We clear and check the rope guard and seal area during every polish.

Can propeller polishing be done while the vessel works cargo at Freetown?

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 Freetown and tell you honestly whether the window you have is enough.

Do you need a diving permit from Sierra Leone Ports Authority?

Yes, and we obtain it. Diving permission from Sierra Leone 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 Freetown?

Visibility at Freetown Port is moderate in the dry season, low from roughly May to October when rain run-off from the Sierra Leone River clouds the harbour, 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 Freetown?

Feeder container ships, General cargo and break-bulk ships, Product tankers, Fishing vessels, Freetown–Lungi ferries — the traffic at Freetown Port runs to containers, rice and bagged general cargo, break-bulk and project 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 Freetown?

Divers and equipment mobilise via Freetown Lungi (FNA). 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 Pepel or Conakry, one mobilisation is often sized to cover both.

What does propeller polishing at Freetown cost?

It depends on the vessel's dimensions and wetted area, the fouling state found, the coating specification and the working window available at Freetown. 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 Freetown and you get a scoped price, usually the same working day.

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