Your ship will sail along Discovery Passage, between Vancouver Island and Quadra Island. As the channel tapers, you will arrive at Seymour Narrows, a narrow, 5-km long passage which, in the past, posed a significant challenge for sailors. Between 1850 and 1950, some one hundred ships hit the rocks hidden under the water, and the outcome was often fatal. At the time, due to the strong currents that run through Seymour Narrows, it was considered to be one of the most dangerous waterways in British Columbia. But in 1955, the decision was made to blow up Ripple Rock, two submerged rocks responsible for most of the shipwrecks. This historic explosion made access to this passage much safer.