I’m on a mission after my first two basic scuba diving sessions! I want to understand the nuances of the sport, improve my swimming every summer, and complete a seven-day course before I turn forty.

Mike Parnell knows all about dreams deferred. He also knows how good it feels when one reclaims a dream and turns it into reality. Parnell is owner of Magnum Scuba, a scuba-diving retail shop and ...