Ballistic Trajectory Extended Range Munition

{{short description|Failed US Navy development program}}

The Ballistic Trajectory Extended Range Munition (BTERM) was a failed program to develop a precision guided rocket-assisted 127 mm (5-inch) artillery shell for the U.S. Navy. The program was originally named the Autonomous Naval Support Round (ANSR) and was developed by Alliant Techsystems.[http://www.globalsecurity.org/military/systems/munitions/bterm.htm Ballistic Trajectory Extended Range Munition (BTERM) - Global Security]

The concept was similar to Raytheon's Extended Range Guided Munition with several simplifications and a larger rocket engine. The warhead was based upon that in the AGM-88 HARM anti-radiation missile, and was guided through GPS; however, unlike the ERGM it was intended to fly a strictly ballistic trajectory. Both programs were cancelled in 2008.{{cite magazine|title=Navy Kills Satellite-Guided Weapon|first=Sharon|last=Weinberger|magazine=Wired|date=2006-03-26|url=https://www.wired.com/2008/03/naval-weapon-de/}}