Which signal requires contact with DHQ in person?

Signal 22 is characterized by the requirement for in-person contact with Dispatch Headquarters (DHQ). This procedure is designed to ensure that critical situations are communicated directly, allowing for immediate and clear information exchange. The in-person contact helps clarify any urgent matters that may need detailed attention or specific instructions, ensuring that the appropriate level of response is coordinated effectively.

Other signals, while they may have their own procedures for communication, do not necessitate the direct in-person interaction with DHQ that Signal 22 mandates. This requirement underscores the importance of situational awareness and the need for direct engagement in circumstances where details can significantly impact operational decisions.