Question 115 Deck Safety

The correct answer is D) All of the above. The GMDSS (Global Maritime Distress and Safety System) regulations require that the radio operator cannot disable certain critical message categories, including search and rescue information, navigational warnings, and meteorological warnings. These types of messages are considered essential for maritime safety and must always be received and monitored by vessels at sea. The other options are incorrect because the radio operator does not have the ability to disable these mandatory message categories.