Which documents are subject to inspection when boarding a vessel?

The correct choice indicates that both the vessel registry and the manifest or crew lists are crucial documents required for inspection when boarding a vessel. The vessel registry provides essential information about the ship's ownership, size, and nationality, which is necessary for legal and safety purposes. The manifest and crew lists detail what cargo is being transported and who is on board, enabling authorities to ensure compliance with various regulations, such as immigration laws and customs requirements.

This inspection process is vital for maintaining security and safety at sea, as well as for tracking and managing the cargo and crew onboard a vessel. Understanding the significance of these documents is essential for effective maritime operations and enforcement actions.

The other options, while they may contain important information in specific contexts, do not encapsulate the comprehensive regulatory requirements needed for vessel inspection. Insurance papers and travel itineraries, for instance, are more relevant to the operational aspects of the voyage rather than the legality and compliance that registry and manifest provide. Similarly, cargo loading receipts and navigation charts do not encompass the full scope of identification and compliance oversight necessary in this scenario.