Hi Susan. Not only does this not seem particularly safe, it could also be classified as negligent by some – depending upon the specific circumstances. Being ‘present’ when conducting any type of training (not just boot camp) seems to be a common place rule of thumb in my opinion, and it would be hard to argue that you are ‘training’ or ‘instructing’ when you’re not physically present.
An absent instructor isn’t “instructing”. Oversight with a boot camp is a must. This instructor should be advised to be present or eliminate the class and/or let another instructor take over. Also, the club/facitlity the instructor is representing should be notified of this as well.
I believe that an instructor should stay with his/her group at all times not only for liabilty reasons, but also for motivation. The people who come to the class are there because they want to be pushed and to be motivated. If the instructor can’t keep and eye at all of the participants, I will have to agree with Michael…there must be an extra instructor on site and instruct those who are left behind and/or are on a slower pace than the rest of the group.