Final answer:
A spotter needs to be on the vessel while towing a person besides the operator to ensure the person's safety and a smooth boating experience.
Step-by-step explanation:
When towing a person, in addition to the operator, it is important to have a designated spotter onboard the vessel. The spotter's role is to keep a close eye on the person being towed, ensuring their safety throughout the activity.
The spotter should be knowledgeable about safe boating practices, aware of local boating regulations, and trained to operate the boat if necessary. They should also have good communication with the operator and be able to give clear instructions to the person being towed.
Having a spotter onboard helps to ensure a safe and enjoyable boating experience for everyone involved.