in your house with circuit breakers. same type of an idea. but the question i have is, again it has been a while and i don't have the manuals in front of me. does the number one radio, the captain's radio, come off the emergency bus that would be powered at least by the battery in case of failure of the other buses? is it separated that way? >> my understanding is it is connected to the primary bus. i'm not sure if you're referring to the hot battery bus or the emergency power bus. i don't think it is. i think it is just the bottles in case you're on the ground. basic things you need on the ground in case of emergency. the trans ponder is on that but i don't believe the captain's radio is. no. >> thank you guys.