VANCOUVER -- The Transportation Safety Board is analyzing cameras from passengers and crew as part of its investigation into a deadly whale-watching accident that claimed six lives near Tofino, B.C.

Five Britons and an Australian died when the Leviathan II capsized last October.

TSB spokesman Chris Krepski says navigational equipment from the 20-metre vessel carrying 24 passengers will also be analyzed.

He says the investigation will also determine how factors such as sea and operating conditions and location of the passengers affected the ship in the moments before a large wave hit.

The Pacific Whale Watch Association is already blaming sea conditions, noting a similar fatal accident occurred 17 years ago in the same waters off Plover Reef.

TSB officials have said that if anything is uncovered suggesting an immediate risk, details will be released right away.