From Global News today:

Twenty years after the sinking of the Queen of the North, a former chief executive of BC Ferries says the tragedy remains one of the darkest moments in the company’s history.

In an interview with Global News, former president and CEO David Hahn recalled the night the ferry struck Gill Island in Wright Sound and sank, saying the situation was “bewildering” and “very scary” as details slowly emerged.

The vessel went down at about 1:40 a.m. on March 22, 2006, with 101 passengers and crew on board. Ninety-nine people were rescued, but two passengers, Gerald Foisy and Shirley Rosette, were never found.

Hahn said the initial hours following the sinking were marked by limited information due to the remote location. https://www.msn.com/en-ca/news/canada/we-ll-never-know-why-former-ceo-recalls-fatal-bc-ferry-sinking-20-years-later/ar-AA1Zbio4?ocid=BingNewsVerp

No CalMac ferry has ever sunk but in 1972:

The MV Loch Seaforth (built 1947) operated as a mailboat and passenger vessel for David MacBrayne Ltd (predecessor/related to CalMac) until 1972, and then briefly under CalMac. On March 22, 1973, it ran aground on Cleit Rock in the Sound of Gunna while carrying passengers (including the CalMac General Manager and Chairman). Everyone was safely evacuated, and the ship was towed to Gott Bay on Tiree. However, during efforts to pump it out and refloat it, a bulkhead failed, causing it to sink completely and block Tiree’s only pier for several weeks (until May 11, 1973).