During this year’s joyful Christmas with my precious family, I hoped my son would always feel his father’s love in his heart and that the boy in him would always remember it….just as my grandsons feel that love passed on to them....

Breaking the surface, I tear off my mask and gaze into the deep blue sky. I add air to my BCD, lean back and allow the salty sea to support me. Gazing at the moon on the far end of the horizon and...