Final answer:
A vessel operator in a manatee protection zone marked "slow speed, minimum wake" must operate their boat at a speed that creates minimal wake to protect manatees.
Step-by-step explanation:
When operating a vessel in a manatee protection zone marked "slow speed, minimum wake", the vessel operator is required to operate the boat at a speed that does not create a large or disruptive wake.
This precaution is meant to protect manatees, which are endangered marine mammals, from being struck by boats or from the harmful effects of propeller wash and wave action. Vessel operators should be vigilant and adhere to all posted signage to ensure the safety of manatees.