Question 550Navigation General

The correct answer is C) 30 minutes. In a national emergency, when communicating via the Navy, messages sent with the IMMEDIATE precedence are required to be delivered within 30 minutes. This is a standard protocol for urgent messages during crisis situations, where timely delivery of critical information is paramount. The other answer choices are incorrect because 6 hours (A) and 3 hours (B) are too long for an IMMEDIATE message, while 10 minutes (D) is too short for the established IMMEDIATE precedence standard.