Red alert 3 port barbarians, how to get the deputy commander to release the nano-worm shield?

The mission goal of this level is to destroy the battlefield jamming device, that is, four luminous objects similar to radar. There are net lights flashing on the ground of each tower. Click on it, and a slogan "Let the commander assist in the attack" will appear. Click OK to release it. This pass is mainly a naval battle. It is only necessary to protect the shipyard and build a warship, which can be thrown to the shore, provided that the shipyard is destroyed.