The answer to that question is “some do, but not all”. Cruise lines compare their ships to hotels and
resorts, where signs often warn that no lifeguard is on duty and guests swim at
their own risk. I doubt anyone would disagree that it is the responsibility of
the parent to assume the first layer of supervision, but is that realistic on
ships that may carry as many as 1,000 children on a summer voyage?
Disney became the first major cruise line to hire lifeguards
for its family pools in 2013. The lifeguards are always on duty, so long as the
family pool is open. He /she is constantly moving around the pool and there are
even multiple lifeguards when necessary. This move came after a tragic accident
earlier that same year.