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Charles Walbridge has 27 years' experience as a whitewater paddler, guide, and instructor. He was safety chair of the American Whitewater Affiliation from 1986 to 1991 and has served the American Canoe Association in the same capacity since 1977. Wayne A. Sundmacher Sr., a professional instructor and certified emergency medical technician, has been teaching safety programs for outdoor enthusiasts and rescue agencies for more than a decade. He has served on safety teams for world-class whitewater races and co-developed the ACA Swiftwater Rescue Program with Charlie Walbridge. Charlie makes his home in Penllyn, Pennsylvania; Wayne in Mercerville, New Jersey.