As they say on another site, "That'll buff right out!"
Wiki's take on the Queen of Oak Bay collision
seems that it was very a much of a case of "For want of a nail... a kingdom was lost":
<<On June 30, 2005 at about 10:10 in the morning (17:10 UTC), the vessel Queen of Oak Bay, on the Nanaimo to Horseshoe Bay (or Trans-Canada Highway) ferry route
power four minutes before she was to dock
at the Horseshoe Bay terminal. The vessel became adrift, unable to change speed, but able to steer with the rudders. The horn was blown steadily and an announcement telling passengers to brace for impact was made minutes before the 139 m (456 ft) ship slowly ran into the nearby Sewell's Marina, where she destroyed or damaged 28 pleasure craft and subsequently went aground a short distance from the shore. No casualties or injuries were reported.
...On July 7, 2005, BC Ferries concluded that a missing cotter pin was to blame....>>