AXBT: Airborne eXpendable BathyThermograph is an air-deployed, expendable, ocean temperature profiling probe. The AXBT consits of: a temperature probe, 300-1000 meters of cable, a VHF transmitter and antenna, and a salt water activated battery. After the AXBT hits the surface and stabilizes, the transmitter is activated and the temperature probe is released. The surface transmitter telemeters the falling probes temperature to the data system on the aircraft. The International Ice Patrol uses AXBT's to locate ocean currents which is the major force that controls the drift of icebergs, also AXBT's provide an accurate sea surface temperature which is used for iceberg deterioration in the iceberg prediction computer model.