What are the requirements for a Notice of Arrival (NOA)?

The Notice of Arrival (NOA) is a vital document that vessels are required to submit prior to entering a port in order to ensure compliance with safety, security, and environmental regulations. The correct answer specifies that vessels that are 300 gross tons (GT) and above must submit their NOA either at least 96 hours prior to arrival or at least 24 hours prior under specific conditions. This timeline allows the relevant authorities adequate time to process the information, assess potential security risks, and prepare for the vessel's entry, ensuring a seamless and safe arrival.

The distinction in the required timeframes also accommodates situations where the vessel may not have sufficient advance notice of its arrival, still ensuring compliance with the regulations while maintaining operational flexibility. This layered approach is crucial for managing maritime traffic and maintaining the security of port operations effectively.