In which scenario is a secondary inspection of a vessel typically warranted?

The scenario in which a secondary inspection of a vessel is typically warranted is when distress signals are received or there is suspicion of illegal activity. This is critical for ensuring the safety of the crew, passengers, and the vessel itself. Distress signals indicate that there is an urgent situation that needs to be assessed, which may involve an emergency situation requiring immediate assistance. Similarly, if there are indications of illegal activity, a secondary inspection is necessary to investigate further and ensure that any unlawful behavior is addressed appropriately.

In both of these instances, the risks are high, and an additional layer of scrutiny is essential for the protection of all parties involved. Therefore, acting on distress signals or suspicious behavior is a priority for law enforcement and safety officials, necessitating a thorough follow-up inspection to ascertain the conditions on board the vessel.