Canadian investigators, trying to determine the cause of last month's fatal ferry sinking on the Pacific coast, will launch another probe of the underwater wreck site. The dive operation will examine the wheelhouse of the sunken ferry Queen of the North, which is located in about 400 meters of water in British Columbia's Inside Passage, the Transportation Safety Board said. The ocean-going ferry, carrying 101 passengers and crew, sank in the early morning darkness of March 22, about 120 km (75 miles) south of Prince Rupert. 99 people were rescued but two are missing and presumed dead. Investigators conducted a two-day dive at the wreck site several days after the accident…