Editing M109 howitzer (section)

===Training systems===
The US Army uses the fire support combined arms tactical trainer (FSCATT) in two versions, for initial and sustainment training of the M109A6 and M109A5.<ref>{{cite web|title=Fire Support Combined Arms Tactical Trainer (FS-CATT)|url=http://www.peostri.army.mil/PRODUCTS/FS-CATT/|publisher=US Army|access-date=10 December 2011|url-status=dead|archive-url=https://web.archive.org/web/20111109074435/http://www.peostri.army.mil/PRODUCTS/FS-CATT/|archive-date=9 November 2011}}</ref> The system uses an actual surplus turret and a simulated ammunition system.

The Swiss Army uses a highly advanced KAWEST trainer from Van Halteren Metaal of the Netherlands.{{Citation needed|date=November 2024}}

The Dutch, Belgian, Thai, and Israeli armies have various configurations of the Van Halteren Metaal M109 Howitzer Crew Trainer (HCT).{{Citation needed|date=November 2024}}

The US Army PEO STRI had a program called M109A7 Howitzer Crew Trainer (HCT). The plan was to procure 16 systems beginning in the 3rd Quarter of FY 20.<ref>
{{Cite web |url=https://www.fbo.gov/index?s=opportunity&mode=form&id=bfa37012ddb08eb848b2ee5653f562d3&tab=core&_cview=1 |title=Howitzer Crew Trainer (HCT)- Sources Sought - W900KK-19-C-HCT1 - Federal Business Opportunities: Opportunities |access-date=21 January 2019 |archive-url=https://web.archive.org/web/20190122094642/https://www.fbo.gov/index?s=opportunity&mode=form&id=bfa37012ddb08eb848b2ee5653f562d3&tab=core&_cview=1 |archive-date=22 January 2019 |url-status=live }}
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