1. Shephard — “As Indonesia doubles up its order, who else is looking at the Arrowhead 140 frigate design?” (Jan 28, 2026)
https://www.shephardmedia.com/news/naval-warfare/as-indonesia-doubles-up-its-order-who-else-is-looking-at-arrowhead-140/
2. Naval News — “Babcock announces agreement with Indonesia for two more Arrowhead 140 frigates” (Jan 21, 2026)
https://www.navalnews.com/naval-news/2026/01/babcock-announces-agreement-with-indonesia-for-two-more-arrowhead-140-frigates/
3. Naval News — “Indonesia Launches First Domestically Built Arrowhead 140–Based Frigate” (Dec 19, 2025)
https://www.navalnews.com/naval-news/2025/12/indonesia-launches-first-domestically-built-arrowhead-140-based-frigate/
4. Navy Lookout — “Indonesia to build a further two Arrowhead 140-derived frigates” (Jan 21, 2026)
https://www.navylookout.com/indonesia-to-build-a-further-two-arrowhead-140-derived-frigates/
5. Navy Lookout — “Royal Navy’s Type 31 frigates to be fitted with Mk41 vertical launch system” (May 17, 2023)
https://www.navylookout.com/royal-navys-type-31-frigates-to-be-fitted-with-mk41-vertical-launch-system/
6. Janes — “UK Royal Navy announces Mk 41 VLS fit for Type 31 frigates” (May 19, 2023)
https://www.janes.com/osint-insights/defence-news/sea/uk-royal-navy-announces-mk-41-vls-fit-for-type-31-frigates
7. UK Ministry of Defence (gov.uk) — “First steel cut for Royal Navy Type 31 programme” (Sep 23, 2021)
https://www.gov.uk/government/news/first-steel-cut-for-royal-navy-type-31-programme
8. Naval News — “UK MoD Formally Awards Type 31 Frigate Contract to Babcock” (Nov 15, 2019)
https://www.navalnews.com/naval-news/2019/11/uk-mod-formally-awards-type-31-frigate-contract-to-babcock/
9. Forces News — “Type 31: Babcock Signs £1.2bn Frigate Contract” (Nov 15, 2019)
https://www.forcesnews.com/news/type-31-babcock-signs-ps12bn-frigate-contract
10. Royal Navy — “Take a bow, HMS Venturer – first Type 31 frigate emerges” (May 27, 2025)
https://www.royalnavy.mod.uk/news/2025/may/27/20250527-venturer-emerges
11. Babcock (official) — “Babcock awarded contracts to drive forward Poland’s frigate programme, Miecznik” (Sep 7, 2022)
https://www.babcockinternational.com/news/babcock-awarded-contracts-to-drive-forward-polands-frigate-programme-miecznik/
12. Naval News — “Babcock awarded Capability Insertion Period contract by UK MOD for Type 31 frigates” (Apr 10, 2025)
https://www.navalnews.com/naval-news/2025/04/babcock-awarded-capability-insertion-period-contract-by-uk-mod-for-type-31-frigates/