- The problem
- An extended period at anchorage in warm water had produced heavy slime and shell growth across the flat bottom and vertical sides, with a self-polishing coating already two-thirds through its service life.
- What we did
- Brush cart cleaning of the full underwater hull with hand work on niche areas, brush hardness selected against the coating specification so the remaining antifouling was not stripped. Carried out at anchorage over two working days.
- Result
- Hull returned to a smooth condition without off-hire, with before-and-after video by area issued for the technical file.
Projects
Work that reflects how we operate
Underwater problems repeat in patterns — a coating too far gone to clean hard, a survey due with no dry dock slot, a thruster losing response with no confirmed cause. These are the patterns we plan around.
Underwater hull cleaningPanamax container ship
Propeller super polishingSupramax bulk carrier
- The problem
- Calcareous growth and blade roughness following a long idle period, with a performance claim under discussion between owners and charterers.
- What we did
- Staged polishing of all blade faces to a Class A mirror finish, working the leading edges and blade tips where roughness costs the most, with surface-supplied divers over a single working day.
- Result
- Blade finish documented before and after, giving both parties an evidenced baseline rather than a disputed estimate.
Thruster cleaning & polishingHandysize bulk carrier
- The problem
- Reduced bow thruster response reported during berthing, with growth suspected in the tunnel and on the propeller but no confirmed cause.
- What we did
- Tunnel inspected and filmed first, then grating, tunnel walls and thruster blades cleaned by hand under a strict lock-out of the thruster controls with the bridge briefed and the isolation confirmed.
- Result
- Manoeuvring response restored, with the tunnel condition recorded on video for the vessel's maintenance file.
In-water class surveyMR product tanker
- The problem
- Bottom survey falling due with no dry docking slot available inside the window, and a class society requiring evidence before granting credit.
- What we did
- Survey planned with the attending class society in advance, hull cleaned where necessary for visibility, then filmed to the society's required coverage with divers in continuous comms with the surveyor.
- Result
- Survey completed in the water and accepted by class, with the documentation package issued the same week.
UWILDAframax crude oil tanker
- The problem
- Underwater inspection in lieu of drydocking required for a vessel on a tight trading pattern, covering rudder, propeller, sea chests and hull plating.
- What we did
- Full UWILD scope run over three days at anchorage, with measured references, close-up filming of designated areas and the sea chest gratings opened and inspected under permit.
- Result
- Class-acceptable UWILD report delivered, with the vessel keeping its trading pattern instead of taking a dry dock slot.
Hull cleaning & propeller polishingPlatform supply vessel
- The problem
- Off-charter to on-charter window of under three days, with the incoming charterer requiring evidence of hull and propeller condition.
- What we did
- Hull cleaning and propeller polishing run back to back by a single dive team, filming throughout so the condition record was produced as a by-product of the work rather than a separate survey.
- Result
- Vessel presented for on-hire inspection inside the window with the hull condition already evidenced on video.
Capability
Every scope, one mobilisation
Most of our work is multi-scope. Cleaning, polishing and survey delivered on the same dive removes the handover delays that dominate a timeline when the work is split across contractors.
Get in touch
Have a scope you want assessed?
Send the vessel, the antifouling specification and the port. We tell you what the hull actually needs — including when it is less than you expected.

