IMCA - Hull crack arising from vibration

A small vessel built of aluminium experienced vibration coming from the propeller.

What happened?

It was initially suggested that the vessel had been damaged hitting a floating object, and that following assessment, that the damage was minimal permitting continued operations.

However, a few weeks later a crack in the vessel skeg was discovered as water was leaking into the steering room. Crew installed a cement box to stop the leaking. Shore-based management required the vessel to stop operations for repairs.

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