 The AIS-P protocol is an alternative to the ADS-B and Mode S based TCAS protocols, and solves the problems of frequency congestion, by eliminating a requirement for multiple packet messages, or new longer packet definitions for ADS-B not established by international treaty, and by eliminating the 24 bit overhead for named identity in each packet of the message (required to tie multiple packets together into a message).One packet encodes latitude and longitude, altitude, direction, and speed (full position and velocity), handles error detection and recovery, along with channel use arbitration, in the AIS-P protocol.This reduces verbose overhead unnecessary for collision avoidance purposes.