Propeller Rudder Inspection Kamsar
The propeller and rudder are the ship's steering and propulsion at the stern. Small damage can cause vibration, loss of efficiency or steering problems, and serious damage can stop the ship. A propeller and rudder inspection in Kamsar lets the owner check these parts while the ship is afloat, often at the anchorage area before sailing.
Propeller Inspection
The Diver checks each blade on both faces, from root to tip. Typical findings include nicks and bends from debris, cracks at the root or tip, erosion and cavitation damage, pitting from corrosion and surface roughness from fouling. The hub, the cone and the blade-to-boss interface are also checked for leaking grease, cracks and loose fittings. The condition of each blade is recorded with photographs and CCTV.
Rudder Inspection
The rudder is checked for bends, cracks, plate corrosion, weld failures and signs of impact. The Diver examines the pintle and bearing area for wear or movement, the rudder stock gap and any visible leakage from the rudder carrier. Where the ship has a becker or flap rudder, additional movements and hinges are checked. If steering problems have been reported, the Diver may be asked to operate the rudder through its movement while the camera watches.
Signs That an Inspection Is Needed
- Vibration at certain speeds, especially at the stern.
- Unusual noise or a drop in speed for the same power.
- Rudder angle indicator not matching the physical position.
- A grounding, contact or known rope or net entanglement.
- Long periods at anchor in warm water with no propeller polish.
Measuring What Matters
Where possible, we measure blade damage, such as the length of a bend or a crack, and note the radius at which it occurs. Damage near the tip is usually less critical than damage at the root. For the rudder, bearing clearance can sometimes be assessed by measurements of movement. The class surveyor and the propeller manufacturer can then decide on repair, temporary action or replacement.
What Happens Next
Most findings can be dealt with in the water. Light blade damage can be dressed by grinding and polishing, fouling can be removed and ropes can be cut away. If the problem is serious, the report gives the owner the information needed to plan a dry-docking or a visit by a propeller specialist.
Request an Inspection
Send us the ship's details and the symptoms. We will plan the inspection and report quickly.
Combining Propeller, Rudder and Shaft Checks
The propeller, rudder and shaft seal form the stern gear system, and problems in one often affect another. A bent rudder may show up as extra rudder angle, which loads the propeller. A damaged seal may follow rope entanglement. By inspecting the whole stern gear in one dive, we find connected issues and give the engineer a complete picture. The combined inspection takes about 4 to 8 hours and is often the best value for money.
Reading Wear Patterns
The pattern of wear tells a story. Uneven erosion across blades may point to inflow problems from the hull shape or a damaged rudder. Polished bands on the rudder leading edge can indicate contact with debris. Pitting on one blade only may suggest a casting or repair issue. We note such patterns in the report and, where useful, propose follow-up checks, so that the owner understands not only what is damaged but also why it may have happened. This can prevent repeated damage on later voyages and supports better decisions on maintenance.
Frequently Asked Questions (FAQ)
Q1. How many blades does a typical bulk carrier propeller have?
Most have 4 or 5 blades, with a diameter of around 6 to 8 m for Panamax size ships.
Q2. Can a rudder be checked without dry-docking?
Yes. A Diver can examine the rudder, pintles and stock gap in the water, and measure movement and wear indications.
Q3. What is cavitation damage?
It is erosion of the blade surface caused by collapsing vapour bubbles, usually seen as pitted or rough areas near the tips and trailing edges.
Q4. How long does a propeller and rudder inspection take?
About 3 to 6 hours with CCTV and photographs, including recording and reporting.
Q5. Should the shaft be locked during the inspection?
Yes. The shaft must be locked and the main engine isolated before a Diver approaches the propeller.