Interior communications electrician (IC) is a rating in the United States Navy. They operate and perform organizational and intermediate maintenance on alarm, warning, and indicator systems; interior communications; and ship's control, entertainment, and navigation systems. IC is one of the most versatile ratings in the U.S. Navy with equipment all the way forward, all the way aft, all the way up the mast and on the bottom of the ship. Members of this rating are commonly referred to as "IC-men" by Navy personnel.