What action must a boarding officer take upon finding hazardous waste on a vessel?

Upon discovering hazardous waste on a vessel, it is crucial for the boarding officer to secure the area and notify the appropriate hazardous waste management authorities. This action ensures the safety of all individuals present and prevents any potential environmental harm that may arise from the hazardous materials.

Securing the area helps to contain the hazardous waste and prevents accidental exposure or spills that could pose health risks to the crew, inspectors, or the environment. By promptly notifying the relevant authorities, the boarding officer facilitates a proper response to the situation, ensuring that trained personnel can safely handle, remove, and dispose of the hazardous waste in accordance with established regulations and protocols. This response aligns with environmental protection laws and the responsibility of the Coast Guard to safeguard public and environmental health.

The other options do not adequately address the potential dangers associated with hazardous waste, and ignoring the issue or simply documenting it without taking action would neglect the responsibility to protect both people and the environment. Transferring the waste to a nearby port is not a viable option as it may further risk contamination and does not comply with safe hazardous material management practices.