Question 543Navigation General

The correct answer is C) O (IMMEDIATE). When operating under Naval Control of Shipping (NCS) and needing to send a message warning of a hurricane, the appropriate precedence to use is IMMEDIATE (O). This is because a hurricane warning is time-sensitive and requires prompt action, but does not rise to the level of an emergency that would warrant the highest FLASH (Z) precedence. The other options are incorrect because PRIORITY (P) is for messages of a lesser time-sensitive nature, and ROUTINE (R) is for standard, non-time-critical communications. Sending a hurricane warning under these lower precedences would not ensure the message is handled with the necessary urgency.