I thought Owl and Patch were both still outside, with Patch waiting to see if the third guard would let him inside or not? Fox is being remote-piloted to climb the outside of the building while the guard coverage is compromised, and hopefully will be able to get in, steal some stuff, plant the explosives and get out safely.
Elissa's radio dark at the moment, but Patch still has his radio live to receive transmissions, which he'll probably need when the time comes for Archangel to give him the evacuate signal so he and Owl can get out of the area when it's time for the fireworks. Both Patch and Owl are currently armed, and both have their guns out in the open so could probably get the drop on the guard if needed.
Four guards are currently distracted, with two driving off in a Jeep and another two moving to check the perimeter of the dockyard. One guard is with Owl and Patch, and there may be others around the building that they're not yet aware of.