Thruster Cleaning & Polishing at Vale dos Cavaleiros 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 Vale dos Cavaleiros Port, Fogo. 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 Vale dos Cavaleiros — Fogo's only port on an exposed Atlantic coast — that tends to show at exactly the moment the thrust is needed.
Berthing at Vale dos Cavaleiros means bringing a ferry into a small harbour behind a breakwater, onto a short pier, often with swell running outside. That takes a strong bow thruster. A thruster that has lost power to fouling makes every berthing harder and more dependent on the weather. Cleaning the tunnel, blades and gratings restores the thrust — and because the thruster tunnel is higher on the hull than the keel, it can often be worked alongside even when the bottom cannot.
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 Vale dos Cavaleiros
Vale dos Cavaleiros sits on the exposed west coast of Fogo, about three kilometres north of São Filipe, and the Atlantic swell that reaches this coast is the deciding factor for any in-water work. The port was rebuilt in 2013 with a heavy breakwater and two short piers — 70 and 95 metres long, both about 5 metres deep — which is enough for ferries and coasters but leaves little water under the keel. Larger coasters and any dive that needs room lie off the port at anchor.
- Where we work
- Two short piers behind the breakwater · Anchorage off the port
- Vessels we see here
- Inter-island ferries · General cargo coasters
What we do at Vale dos Cavaleiros
- 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 ENAPOR – Portos de Cabo Verde, 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 Vale dos Cavaleiros
The trade-wind and swell season governs the calendar at Vale dos Cavaleiros Port, with the strongest trade winds from roughly December to May, and a short rainy season from August to October. The islands sit in open ocean, so a port's exposure depends on which side of its island it faces: the lee-side harbours stay calm while the trade wind blows, but long-period swell from North Atlantic storms reaches the north and west coasts in winter, and the late-summer tropical waves that pass through here can turn into storms. Work here is done with the vessel riding to her anchor, so the dive plan is built around sea state and swell rather than a berth slot, and the team stands by for a workable window rather than a scheduled one.
Work is taken at the two short piers behind the breakwater and anchorage off the port, and which of those a vessel ends up at changes the dive plan more than the season does. Teams mobilise via São Filipe (SFL) or Praia (RAI), 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 Vale dos Cavaleiros
The working fleet here spends most of its life at low speed in warm water, so growth is heavy, mixed and reaches the hard calcareous stage sooner than on deep-sea tonnage. Left too long it starts damaging the coating rather than just slowing the vessel.
The ferries and coasters serving Fogo are rarely idle for long — they run the island's supply on a tight schedule — so the fouling we find is steady, even growth from constant short trips in warm water rather than the heavy build-up of a long wait. The niches are the exception: thruster tunnels, sea chests and the stern gear collect growth that the hull flow never clears.
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 Vale dos Cavaleiros
- 1
Scope and vessel details
Tell us the vessel, her particulars, the coating specification and the window at Vale dos Cavaleiros. 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
ENAPOR – Portos de Cabo Verde 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 Vale dos Cavaleiros
Divers, compressors, brush carts and cameras mobilise via São Filipe (SFL) or Praia (RAI). Where a vessel is also calling at Furna, 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.
Vale dos Cavaleiros Port at a glance
- Port type
- State Port
- Island
- Fogo
- Country
- Cape Verde
- Water body
- Atlantic Ocean
- Port authority
- ENAPOR – Portos de Cabo Verde
- Main cargoes
- General cargo, Construction materials, Food and supplies
- Crew mobilisation
- São Filipe (SFL) / Praia (RAI)
- Services here
- Hull Cleaning
Frequently asked — Thruster Cleaning at Vale dos Cavaleiros
Do you provide thruster cleaning at Vale dos Cavaleiros Port?
Yes. Cleanship Marine works Vale dos Cavaleiros Port in Fogo, Cape Verde, covering the two short piers behind the breakwater and anchorage off the port. Teams mobilise via São Filipe (SFL) or Praia (RAI) with the full spread.
Can the thruster be cleaned alongside at Vale dos Cavaleiros even though the berth is shallow?
Often, yes. The bow thruster tunnel sits higher than the keel, so it can usually be reached alongside, where the flat bottom cannot. The thruster is isolated first, and if the swell makes the berth unsafe for divers, the job moves to the anchorage.
Can thruster cleaning be done while the vessel works cargo at Vale dos Cavaleiros?
Not usually at the berth. The piers are short and shallow and are needed for the next ferry or coaster, so hull work is done at anchor off the port — or, for a ferry, during a lay-over — in a window the swell allows. The vessel stays on hire throughout, and there is no diversion and no dry dock. We scope against the conditions at Vale dos Cavaleiros and tell you honestly whether the window you have is enough.
Do you need a diving permit from ENAPOR – Portos de Cabo Verde?
Yes, and we obtain it. Diving permission from ENAPOR – Portos de Cabo Verde, 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 Vale dos Cavaleiros?
Visibility at Vale dos Cavaleiros Port is usually good — it is open ocean water — but swell stirs up the dark volcanic sand in the shallows near the piers, and the trade-wind and swell season 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 Vale dos Cavaleiros?
Inter-island ferries and General cargo coasters — the traffic at Vale dos Cavaleiros Port runs to general cargo, construction materials, food and supplies, 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 Vale dos Cavaleiros?
Divers and equipment mobilise via São Filipe (SFL) or Praia (RAI). 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 Furna or Praia, one mobilisation is often sized to cover both.
What does thruster cleaning at Vale dos Cavaleiros cost?
It depends on the vessel's dimensions and wetted area, the fouling state found, the coating specification and the working window available at Vale dos Cavaleiros. 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 Vale dos Cavaleiros and you get a scoped price, usually the same working day.
Thruster Cleaning & Polishing at Vale dos Cavaleiros Port.
Tell us the vessel, her ETA at Vale dos Cavaleiros and the window. You get a scope, a crew size and an honest duration — usually the same working day.