D were designated G. The FIM-92E or Block I was developed from 1992 and delivered from 1995 (certain sources state that the FIM-92D is also part of the Block I development). The main changes were again in the sensor and the software, improving the missile's performance against low-signature targets. A software upgrade in 2001 was designated F. Block II development began in 1996 using a new focal plane array sensor to improve the missile's effectiveness in "high clutter" environments and increase the engagement range to about 25,000 feet (7,600 m). Production was scheduled for 2004, but Jane's reports that this may be on hold. Since 1984 the Stinger has been issued to many U.S. Navy warships for point defense, particularly in Middle Eastern waters, with a three-man team that can perform other duties when not conducting Stinger training or maintenance. Until it was decommissioned in September 1993, the U.S. Navy had at least one Stinger Gunnery Detachment attached to Beachmaster Unit Two in Little Creek Virginia. The sailors of this detachment would deploy to carrier battlegroups in teams of two to four sailors per ship as requested by Battle Group Commanders. Replacement The original Stinger's reprogrammable microprocessor has become obsolete in 2023, and a service life extension will keep the Block I in service until 2030. With the arsenal declining from obsolescence, on 10 November 2020 the U.S. Army issued a request for information for a replacement MANPADS. The new system will be compatible with the Stinger Vehicle Universal Launcher used on the IM-SHORAD and be able to defeat fixed and rotary-wing aircraft, as well as Group 2 and 3 UAS as well or better than the Stinger. A contract for up to 8,000 missiles is planned to be awarded by 2026. The request for information, to interested firms, only went out in April 2022. According to Reuters the US government has signed a contract for 1,468 Stingers worth a total of $687 million. This may be to replace stock sent to Ukraine. Raytheon Chief Executive Greg Hayes said on 26 April: "Some of the components are no longer commercially available, and so we’re going to have to go out and redesign some of the electronics in the missile of the seeker head. That’s going to take us a little bit of time". According to the report this new contract has no timeline. Neither US officials or officials from Raytheon