🔍 Key Concepts

• Urgent medical or evacuation need versus routine communication • Standard helicopter request signals used in maritime communications (especially in message code systems) • Difference between distress, urgency, and routine signals in maritime practice

💭 Think About

• Which of these two-letter codes (or code plus numeral) is associated with requesting specific services, such as medical help or helicopter assistance? • Think about where you might find these codes: in standardized radio/message code books used at sea. Which option looks most like a code-group for a special service request? • Is the helicopter request more likely to be a general distress signal or a specific type of assistance within a message/code system?

✅ Before You Answer

• Check in a maritime message/code book which group is defined as “I require a helicopter immediately” or similar wording. • Verify that the correct group is classified under urgency/assistance required rather than general conversation or commendation codes. • Confirm that any numeral added to a two‑letter group (like “1”) actually exists as a defined variation in recognized maritime code groups.