Claims
Rudder impact and structural failures
| Mode | Mechanism | Usual treatment |
|---|---|---|
| Impact | Striking the bottom, a container, a log or a mooring line | Sudden accidental damage, generally covered |
| Water in the blade | Water enters the skin, corrodes the stock and internal webs | Gradual deterioration, generally excluded |
| Bearing failure | Worn upper and lower bearings allowing the stock to move | Wear, generally excluded |
| Stock fracture | Fatigue at the weld or at the quadrant | Turns on whether corrosion or fatigue preceded it |
| Delamination | Blade skins separating from the internal structure | Usually manufacturing or age related |
| Steering gear failure | Cable, quadrant, hydraulic ram | Mechanical breakdown wording applies |
Water ingress inside rudder blades
Most spade rudders are a foam-filled shell around a stainless stock with welded webs. If water gets in through a crack or a bearing, it sits against stainless in a low-oxygen environment, which is the condition stainless corrodes worst in. The corrosion is invisible from outside, and the first external sign is often a crack at the trailing edge or rust weeping from the stock. By then the process has been running for years — and 'years' is what an exclusion is written for.
Evidence for a rudder impact claim
- Record the strike: time, position, depth, what you hit, and the plotter track.
- Report it to the insurer immediately, even if steering still works.
- Have the boat lifted and the rudder dropped for inspection, not just inspected in place.
- Photograph the leading-edge impact point, the bearing surfaces and the internal structure once the blade is opened.
- Ask the surveyor to state explicitly whether the internal structure showed pre-existing corrosion.
- Keep the blade until the claim is closed.
Rudder inspection and maintenance records
- Drill-and-dry testing at haul-out if water is suspected in the blade, and record the result.
- Check bearing play each season with the boat out of the water, and document it.
- Investigate any rust weep at the stock immediately rather than filling and painting over it.
- Keep a dated photographic record of the rudder at each antifoul.
Read the wording before you need it
Almost every disputed marine claim turns on a definition, an exclusion or a condition the owner had never read. The PDS guide explains which sections decide claims.
Related guides
- Boat Insurance Claims Australia: Incidents and Disputes
- Keel Damage Insurance Claims
- Grounding Boat Insurance Claims Australia
- Saildrive Failure Insurance Claims
- Boat Insurance Exclusions Explained
- Product Disclosure Statement Guide for Boat Insurance
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