Final answer:
Upon receipt of orders, the host installation/wing command post will immediately notify the IDO and the Unit Commander. It is crucial for all relevant parties to be alerted promptly to ensure efficient action in accordance with military procedures.
Step-by-step explanation:
The question pertains to the procedures followed by military installations upon receiving orders. Specifically, it asks who should be notified immediately by the host installation/wing command post after receiving orders, alongside the Installation Deployment Officer (IDO). The correct answer is c) Unit Commander. When orders are received, it is standard protocol for the host installation or wing command post to inform both the IDO and the Unit Commander of the new orders without delay. It ensures that all relevant parties are aware of the orders and can begin preparations for deployment or any other actions as required.