Operating at ultra high frequency (UHF), FLTSATCOM allows relatively low-cost terminals with simple antennas for use on highly mobile platforms. It has a relatively small capacity because of its much lower operating frequency. It provides a satellite communication system for high-priority communication requirements for the Navy and Air Force that encompasses almost the entire world. It supports other DoD needs as well. It consists of satellites in geosynchronous equatorial orbit, each with 23 communication channels in the UHF and SHF bands. The Navy has exclusive use of 10 channels for communication with its land, sea, and air forces. The Air Force uses 12 others as part of its AFSATCOM system for command and control of nuclear capable forces. The system has one 500 KHz channel allotted to the national command authorities.