The ocean is a deep and dark place. Haro Strait, our primary kayak tour route in the San Juan Islands reaches depths of over 400 meters. We sea kayakers enjoy the sunlit realm at the interface of air of water. But below 200 meters, there is no light and it becomes pitch-black and intensely cold. Even something as strong and fearsome as a killer whale could get unnerved while swimming through these inky depths. The senses of hearing and touch become the only means of tracking friends, foes, and prey....
