What is the minimum number of two way VHF radios required for SOLAS passenger ships and SOLAS cargo ships of 500 GRT or more?

For SOLAS passenger ships and SOLAS cargo ships of 500 gross tonnage (GRT) or more, the minimum requirement is for at least two operational two-way VHF radios. This is essential for effective communication, especially in emergencies. Having two radios ensures redundancy; if one fails, the other can still be used for signaling distress, coordinating rescues, or maintaining communication with nearby vessels and authorities.

The regulations under SOLAS (International Convention for the Safety of Life at Sea) are designed to enhance navigational safety and emergency preparedness at sea. The specific requirement for two operational VHF radios helps facilitate a reliable line of communication in both routine operations and emergency situations, significantly influencing the safety protocols on board.

Higher numbers of radios, such as three, four, or more, may be recommended for certain vessels based on different operational requirements, such as larger passenger capacity or extended voyages. However, the minimum standard to uphold safety protocols requires at least two operational two-way VHF radios on these types of ships. Thus, while three might provide additional provisions for robust operations, two is the mandated minimum under SOLAS for the specified vessels.