Shortages were not the only communications problems found during the invasion of Grenada; interoperability was another. For example, uncoordinated use of radio frequencies prevented radio communications between Marines in the north and Army Rangers in the south. As such, interservice communication was prevented, except through offshore relay stations, and kept Marine commanders unaware for too long that Rangers were pinned down without adequate armor. In a second incident, it was reported that one member of the invasion force placed a long distance, commercial telephone call to Fort Bragg, N.C. to obtain C-130 gunship support for his unit which was under fire. His message was relayed via satellite and the gunship responded.
Another item to arise from Urgent Fury was the TCP/IP transport layer protocol.