How many security alert buttons are recommended for a vessel?

Having two security alert buttons on a vessel is recommended because it allows for redundancy and ensures that in the event one button fails or is not accessible, the second button is available to alert security personnel. This dual-system approach increases the overall safety and effectiveness of the vessel's security protocol, enabling a swift response to potential threats or emergencies.

Additionally, positioning buttons in different areas on the vessel can accommodate various situations and ensure that crew members can easily access an alert mechanism regardless of where they are on board. This proactive security measure enhances the vessel's readiness to respond to incidents and helps maintain a secure operating environment.