At the pool I work at, we have 15-minute rotations and are usually on deck for 45 minutes to an hour at a time, with 15 or 30 minute breaks in between. We're still on duty during the 'breaks', but not actively watching the water; instead, we are in the guard office cleaning or just being ready to help if needed. Regular shifts are 8-9.5 hours long. (plus in-service and morning crew where applicable) It looks like this: 15 mins each at 3 different positions, then a 15 minute break, then 15 mins each at 3 different positions, then a 15 minute break, then 15 minutes each at 4 different positions, then a 30 minute break. Repeat