Proving that you are never too old to learn and gain qualifications in the Sea Cadets, Lt. (SCC) Kay Adey gained her RYA Power Boat Instructors ticket at the age of 57! Having never done any boating till joining the corps 17years ago, Kay gained her power L2 in 1999 and her safety boat ticket in 2004. Kay also sails (a bit) and is currently trying for her Rowing Instructors ticket.
Although boating is a big part of Sea Cadets, land based qualifications are also easily obtained if you have the will and enthusiasm, no matter what your age.