Describe the procedures for dealing with on board security incident?

In the event of an onboard security incident, crew members should first assess the situation and ensure the safety of passengers. They should then notify the captain and relevant authorities, such as the onboard security team or law enforcement if necessary. The crew should implement established emergency protocols, which may include isolating the incident, documenting details, and maintaining communication with passengers to prevent panic. After managing the immediate threat, a thorough investigation should be conducted to prevent future incidents.