Answer: BUDDYSYSTEM

AnswerCrossword Clue
BUDDYSYSTEMSwimmers' safety precaution
BUDDYSYSTEMMethod of pairing off for safety
BUDDYSYSTEMPractice of pairing swimmers
BUDDYSYSTEMSinger Holly's method?
BUDDYSYSTEMScuba diving safety measure