Which of the following is critical information to include in a distress message?

Including the call sign of the station in distress is crucial in a distress message because it clearly identifies which aircraft or station is experiencing an emergency. This information allows rescue and response teams to quickly understand who is in need of assistance, facilitating a faster and more coordinated response.

While other details such as current weather conditions, the aircraft's model, and previous flight plans may provide useful context, the call sign is specifically necessary for the identification of the distressing station. Knowing who is in distress is the priority in emergencies, as responders must direct their efforts towards the correct entity. Ultimately, clear and immediate identification through the call sign can lead to quicker rescue operations and improved chances of survival.