Definition
A worldwide voluntary ship-reporting system, operated by the U.S. Coast Guard, in which merchant vessels regularly report their position, course, and speed so that the nearest suitable ship can be identified and diverted to assist in a search and rescue (SAR) operation when needed.
Plain English
A global tracking system that knows where merchant ships are at any moment, so if a plane goes down at sea or a ship is in distress, rescuers can quickly find the closest vessel and send it to help.
Context Anchor
Seen in search-and-rescue information and over-water flight planning, especially when an aircraft emergency may occur far from land.
Derivation
Originally stood for 'Atlantic Merchant Vessel Emergency Reporting' when the U.S. Coast Guard launched it in 1958. As participation grew worldwide, the name was changed to 'Automated Mutual-Assistance Vessel Rescue' to reflect its global scope and the cooperative nature of merchant ships helping each other.
Why Pilots Care
Pilots on extended overwater flights may receive faster rescue assistance because nearby ships are already tracked and can be directed to the scene.
Intuition Check
AMVER is not an aircraft tracking system. It is a ship reporting system that can support aircraft rescue when the emergency is over water.
Example Sentence 1
On long overwater flights, pilots take some comfort in knowing that AMVER-participating ships are being tracked across the route and could be diverted to assist in an emergency.
Example Sentence 2
Rescue coordinators checked the AMVER plot and located three merchant ships within fifty miles of the aircraft's last reported position.