Which code stands for Call on control stick relay?

• A. Cos
• B. Co
• C. Cg
• D. Ch

Answer: (A)

In signal maintenance, actions are conveyed with concise codes that pick out the key words from a command, so the message is clear and quick to send.

For a request to initiate a Call on a control stick relay, the essential words are Call, on, and stick. The code COS uses the initial letters C, O, and S to represent those elements, giving a simple, unambiguous shorthand that’s easy to remember and apply in the field. The word relay isn’t included in this mnemonic because the critical action to convey is the act of calling on via the control stick, rather than naming the relay itself.

The other options don’t align as directly with those core words, which is why COS is the best fit for this instruction.