Editing M1 Abrams (section)

===Upgrades===
The M1A2 was a further improvement of the M1A1, with a commander's independent thermal viewer, weapon station, position navigation equipment, and a full set of controls and displays linked by a digital data bus. These upgrades also provided the M1A2 with an improved fire control system.<ref>Diaz, R. Gary. "Intervehicular Information System (IVIS): The Basis for a Tactical Information System", SAE Paper Number: 940982, General Dynamics, 1 March 1994.</ref> The M1A2 System Enhancement Package (SEP) added digital maps, Force XXI Battle Command Brigade and Below ([[FBCB2]]) Linux communications system capabilities for commanders, and an improved cooling system to compensate for heat generated by the additional computer systems.<ref name="auto">{{cite web |url= https://fas.org/man/dod-101/sys/land/wsh2013/12.pdf |title=Abrams Tank Upgrade|publisher=Weapons Systems 2013|year=2013 |url-status= live |archive-url= https://web.archive.org/web/20150505145701/http://fas.org/man/dod-101/sys/land/wsh2013/12.pdf |archive-date=5 May 2015}}</ref>

The M1A2 SEP also serves as the basis for the [[M104 Wolverine]] heavy assault bridge. The M1A2 SEPv2 (version 2) added [[CROWS|Common Remotely Operated Weapon Station (CROWS or CROWS II)]] support, color displays, better interfaces, a new operating system, better front and side armor, and an upgraded transmission for better durability.<ref name="auto"/>

Further upgrades included [[depleted uranium#armor plate|depleted uranium armor]] for all variants, a system overhaul that returns all A1s to like-new condition (M1A1 AIM), a digital enhancement package for the A1 (M1A1D), and a commonality program to standardize parts between the U.S. Army and the Marine Corps (M1A1HC). Improvements to survivability, lethality, and protection have been sought since 2014.<ref name= "g8.army.mil">{{cite web |url= http://www.g8.army.mil/pdf/Army_Equipment_Program2015.pdf |title= Army Equipment Program|archive-url= https://web.archive.org/web/20150409104940/http://www.g8.army.mil/pdf/Army_Equipment_Program2015.pdf |archive-date=9 April 2015 |publisher= U.S. Army |date=May 2014}}</ref>