You get a new unit without loss of time! How to do:
We have a guard. We leave it on anteus for protection. As soon as armor is missing, do the following.
1. We enter the building
2. We look into the lower part, where the aircraft carrier is drawn. It has a green icon of our shepherd guard. Drag it to the stern (in the analyzer). Guardian will be split into atoms. You get energy.
3. Build the same guard. What’s the catch? He has full health! Thus, the ship is always under reliable protection.