What should the captain do if war breaks out during the voyage?

In the event that war breaks out during a voyage, the most prudent course of action for the captain is to seek the nearest safe and neutral port. This decision is grounded in the need to ensure the safety of the crew, cargo, and vessel. War can significantly increase the risks associated with maritime travel, including encounters with hostile forces, potential blockades, and dangers stemming from naval warfare.

By heading to a neutral port, the captain can find refuge from the ongoing conflict while also ensuring that the vessel is not involved in any hostile activities. Neutral ports provide a legal and physical safe haven, allowing for necessary repairs, rest for the crew, and the chance to reassess the situation without the direct risks associated with combat zones.

Continuing the voyage as planned would expose the vessel to various dangers without adjusting for evolving circumstances, which is not a reasonable or responsible choice. Returning to the last port visited could result in encountering conflict there as well, especially if the situation escalated quickly. Lastly, contacting the nearest navy vessel for assistance might not guarantee safety, as naval forces may be preoccupied with combat operations or unable to provide the required shelter. Thus, choosing a neutral and safe port is the most logical and say-focused response during such a critical time.