Which requirement is specifically related to the safety equipment on a charter boat (party boat)?

The correct answer emphasizes the necessity of having a first-aid kit present on a charter boat, which is a critical component of safety equipment. Charter boats operate in environments where accidents or injuries can occur, so having a first-aid kit readily available ensures that immediate care can be administered in case of emergencies. This compliance with safety regulations not only reflects good practice but also contributes to the overall safety of all passengers on board.

Other choices may address relevant aspects of boat operation and passenger comfort, such as the bathroom facility or storage of life jackets, but these do not directly pertain to the availability of essential safety equipment like a first-aid kit. Additionally, while annual checks on safety equipment are important for maintaining the integrity and readiness of that equipment, the option specifically calls for the presence of the first-aid kit as a fundamental requirement that directly supports passenger safety.