Final answer:
A sailor who intentionally causes their own attrition from a class "A" or "C" school is referred to as a Delinquent Sailor, which can carry significant repercussions for their military career.
Step-by-step explanation:
A sailor who willfully commits any action resulting in attrition from a formal class "A" or "C" school is known as a Delinquent Sailor.
Such a designation indicates that the sailor has engaged in behavior that has led to their premature departure from a training program, which is essential for career progression and specialization within the Navy.
These actions can have serious consequences for the individual's military career, including disciplinary action or discharge.