Question 1761Navigation General

The correct answer is A) at least 96 hours before entering port. This is because the regulations require vessels carrying certain hazardous materials, including anhydrous ammonia, to notify the Captain of the Port at least 96 hours prior to the vessel's estimated time of arrival. This is a safety measure to allow the port authorities to prepare for the vessel's entry and ensure appropriate procedures and resources are in place. The other options are incorrect because B) is only required for immediate hazardous conditions, C) relates to a different reporting requirement, and D) is not relevant to the notification of the Captain of the Port for hazardous cargoes.