Queen of Victoria
On August 2, 1970, the Soviet freighter Sergey Yesenin collided with Queen of Victoria in Active Pass, slicing through the middle of the ferry, days after its return to service following stretching. Three people were killed, and damage was estimated at over $1 million (1970 dollars). The Soviet ship was not supposed to be in Active Pass, and as such, the Soviet government was forced to compensate BC Ferries.
Years later, while in Active Pass and within metres of the site of the 1970 collision, Queen of Victoria was disabled by a fire in the engine room.
Queen of Alberni
On August 9, 1979, Queen of Alberni was transiting through Active Pass when it ran aground on Galiano Island, tipping fifteen degrees to starboard. Several large commercial vehicles on board the vessel at the time were damaged. No persons were injured, but a racehorse on board was killed.
On June 1989, Queen of Alberni collided with the loading dock at Departure Bay, causing significant damage to the ship and dock. Six people were injured, including a cook who suffered a fractured cheekbone as he was walking down a set of stairs.
On March 12, 1992, at 8:08 am (16:08 UTC), Queen of Alberni collided with the Japanese freighter Shinwa Maru southwest of Tsawwassen. The collision occurred in heavy fog, with both vessels suffering minor damage. Injuries included 2 serious and 25 minor injuries for the 260 people on the ferry, while none of the 11 people aboard the freighter received injuries.
Queen of Cowichan
On August 12, 1985, three people were killed when Queen of Cowichan ran over a pleasure boat near the Horseshoe Bay terminal.
Queen of Saanich
On the morning of February 6, 1992, Queen of Saanich and the passenger ship Royal Vancouver collided in heavy fog while navigating near the northern entrance of Active Pass. A total of 23 passengers aboard Royal Vancouver were injured. Blame was cast on the crew of Royal Vancouver for failing to track Queen of Saanich on radar, though both vessels were equipped with sophisticated radar systems.
Queen of Nanaimo
On November 2, 2013, the ship was pushed off course by severe weather as it was leaving the berth at Village Bay, Mayne Island. It damaged a private dock, and no one was injured. There was damage to the ship and all Tsawwassen-Gulf Islands sailings had to be cancelled while it was repaired.
Queen of New Westminster
In October 1971, Queen of New Westminster pulled out of its berth at the Departure Bay terminal while vehicle loading was in progress. A car and its two occupants fell into the water. Both of the vehicle's occupants were rescued.
In a similar incident, on August 13, 1992, the same vessel pulled out of its berth at the Departure Bay terminal while vehicle loading ramps were still lowered and resting on the ship. Three people were killed, including two children, one was seriously injured, and two others received minor injuries when a van from Alberta containing 6 people fell 15 m (about 50 ft) from the upper deck onto the lower car deck and finally into the sea below. The van had been stopped and instructed to wait on the loading ramp by terminal crew members. The Transportation Safety Board of Canada determined that the accident was caused by the vessel not properly following departing procedures and secondarily due to poor communication between terminal and ship crew members.
On November 7, 1995, Mayne Queen departed from Snug Cove and ran into a neighbouring marina, heavily damaging a floating dock in addition to 12 small pleasure boats, one of which sank. The crash was primarily attributed to human error and while transferring steering and power control from one control panel to the other located in the ship. The vessel's captain was also inexperienced with the Mayne Queen and normally piloted other vessels. More alarming was the fact that the captain promptly left the scene of the accident after the incident without conducting a proper damage assessment.
On August 12, 1996, Mayne Queen departed Swartz Bay terminal and ran aground off Piers Island after losing steering control. The grounding occurred while performing a regular weekly test of the batteries for the steering control system. A crew member overheard there was going to be a test, and in an attempt to be helpful and without direction, cut all power from the vessel's steering batteries, as he had done at night when the ship was stored, not realizing that the test in question only required the removal of a battery charger and that his assistance was neither requested nor required. No one was injured in the incident, and the vessel was assisted off the rocks at high tide, but it suffered extensive damage to its propulsion system, having two of the four steering and propulsion pods for the right-angle drives sheared off and one of the two remaining pods suffering propeller damage.
Spirit of Vancouver Island
On September 14, 2000, Spirit of Vancouver Island collided with the 9.72 m (about 32 ft) Star Ruby while attempting to overtake the vessel in a narrow channel. The collision occurred approximately 1 km (about ½ mi) from the Swartz Bay Terminal, where the ferry had departed from. Spirit of Vancouver Island struck Star Ruby on its port side, causing the pleasure craft to flip over and eventually right itself, though swamped and heavily damaged. Two passengers aboard Star Ruby later died as a result of injuries sustained by the collision.
On July 13, 2003, Spirit of Vancouver Island collided with the dock at Swartz Bay. Four passengers suffered minor injuries. The accident caused tens of thousands of dollars of damage to the dock and the ship.
On October 9, 2009, a standby generator on Spirit of Vancouver Island caught fire on an early morning sailing out of Swartz Bay Terminal. No one was injured in the incident, but it caused major delays in the ferry system because of the already large volume of traffic for Thanksgiving weekend. Eight sailings were cancelled that day, and the ship remained out of service for the weekend.
Queen of Surrey
On May 12, 2003, Queen of Surrey was disabled as a result of an engine room fire. Queen of Capilano was dispatched and tethered to Queen of Surrey while tugboats were dispatched. The vessel was then towed back to shore. None of the 318 passengers were injured, but several crew members were treated for minor injuries. Some buckling of the main car deck resulted from the heat of the fire, but no vehicles were damaged in the incident.
Queen of Oak Bay
On June 30, 2005, at about 10:10 a.m. (17:10 UTC), the vessel Queen of Oak Bay, on the Nanaimo–Horseshoe Bay (Trans-Canada Highway) ferry route, lost power four minutes before it 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 it destroyed or damaged 28 pleasure craft and subsequently went aground a short distance from the shore. No casualties or injuries were reported.  
On July 1, 2005, BC Ferries issued a statement that Transport Canada, the Transportation Safety Board, and Lloyd's Register of Shipping were reviewing the control and mechanical systems on board to find a fault. An inspection revealed minimal damage to the ship, with only some minor damage to a metal fender, paint scrapes to the rudder, and some minor scrapes to one blade of a propeller.
On July 7, 2005, BC Ferries concluded that a missing cotter pin was to blame. The pin normally retained a nut on a linkage between an engine speed governor and the fuel control for one of the engines. Without the pin, the nut fell off and the linkage separated, causing the engine, clutches, and propellers to increase in speed until overspeed safety devices tripped and shut down the entire propulsion system. The faulty speed governor had been serviced 17 days before the incident during a $35-million upgrade, and the cotter pin had not been properly replaced at that time.
The Queen of Oak Bay was quickly repaired and tested at sea trials. It returned to regular service on July 8, 2005. A complete investigation report consisting of a 14-page Divisional Inquiry and a 28-page Engineering Incident Investigation was released in September 2006.
The Transportation Safety Board's Marine Investigation Report, released on September 6, 2007, indicated that "inadequacies in BC Ferries' procedures on safety-critical maintenance tasks and on ship handling during berthing operations" were major contributing factors to the accident. It appears that insufficient oversight of work done by contractors also played a role in the accident.
Queen of the North
Main article: Queen of the North
On March 22, 2006, Queen of the North sank 135 km (81 mi, 70 nautical miles) south of Prince Rupert, British Columbia, when it struck Gil Island at approximately 1:00 a.m. Two people from 100 Mile House went missing. BC Ferries CEO David Hahn said, "There is a real possibility that they went down with the ship." It is unlikely that it will be possible to salvage Queen of the North.
Officials have determined the cause of the accident was human error by three BC Ferries employees neglecting their navigational duties. Charges of criminal negligence causing death were considered, and a class action lawsuit for the passengers is proceeding while the Ferry and Marine Union seeks to reinstate the fired crew who failed to provide information to the $1 million TSB enquiry.
On January 9, 2007, Quinsam was loading traffic from Nanaimo to Gabriola Island when it unexpectedly pulled out of its berth. A pickup truck on the boarding ramp plunged into the water below. Ferry workers were able to warn the truck's lone occupant, who was able to escape before the vehicle fell.
On December 20, 2011, at 14:50 (21:50 UTC), Coastal Inspiration crashed into the Duke Point terminal, causing minor injuries to one passenger and crew member. The collision damaged the loading ramp, and foot passengers were held up for an hour before being unloaded; the vessel was rerouted to Departure Bay to unload its vehicle traffic. An electrical component failure in the propulsion control system was blamed for the crash. The ferry was taken out of service for repairs before resuming service on January 20, 2012. The damage caused the Duke Point terminal to be closed for five months, resulting in all services from Tsawwassen to be rerouted into Departure Bay. The terminal reopened for service on May 1, 2012.