Boeing Vertol HKP-4 MOD
Mod Number: 3591665470
This Mod adds the Swedish Air Force (Flygvapnet) HKP-4A, Swedish Navy (Svenska Marinen) HKP-4B, and Swedish Armed Forces (Försvarsmakten) HKP-4C helicopters to Sea Power.
The Helikopter 4 (HKP-4) is the designation for the CH-46 Sea Knight bought by Sweden from Boeing Vertol and Kawasaki Heavy Industries during the Cold War.
The HKP-4Bs and HKP-4Cs were used for transport, SAR and anti-submarine warfare with a dipping sonar, two torpedoes and six depth charges (not portrayed in the game) while the HKP-4As (the Swedish Air Force version), performed transport and SAR missions.
This reskin + kitbash of the CH-46 features 6 new liveries including the iconic Swedish Splinter Camo livery and the olive drab one.
The Swedish HKP 4s saw action further to the famous cold war "Whiskey on the rocks" incident during which a Soviet Whiskey-class submarine ran aground near Karlskrona where the Swedish Navy was performing top secret testings of a new torpedo, the Torpedo Type 42 (Torped 42), that had been specifically developed for ASW.
This incident was generally seen as a proof of widespread Soviet infiltration of the Swedish coastline and prompted the Swedish armed forces to deploy the HKP-4s for an intensive submarine hunting which took place in the Hårsfjärden fjord between 1st and 13th October 1981.
– Changelog: Oct 23, 2025: Texture update, added camo to the rotor blades.
– Changelog: Oct 24, 2025: Added the HKP-4C, build by Kawasaki, the Post–Cold War version of the Helikopter 4 employed by the Swedish Armed Forces (Försvarsmakten), armed with the advanced Torped 451 air launched torpedo (top speed of 50 knots) and equiped with a PS-864 search radar (with a range of 111 km), a nose-mounted FLIR (Forward Looking Infrared) and a starboard-side rescue winch. In 1998, a Swedish Defence Forces Joint Helicopter Flotilla was created by merging the various helicopter resources in the Swedish Armed Forces, including the Navy.
This version comes with 2 new liveries including a low viz one (see latest screenshots).
Due to kitbashing (and my own skills) limitations the FLIR and rescue winch models are not 100% accurate. The rescue winch is (of course) non-functional.
– Changelog: Oct 27, 2025: Added the Swedish Air Force HKP-4A with two new liveries (see latest screenshots).
Information about the Swedish Navy’s equipement of the Cold War is rather scarse. Most sources indicate the HKP-4s had a HS-73 dipping sonar with a range of 5.6 km…and that’s all. So, I used the AQS-13E specs by default except for the range reduced to 5.6 km. Likewise there is very little information available about the Torped 42 (and it’s air-launched version the Torped 422) except it had a max speed of 25 knots and had a larger warhead than the Mk-46. So in game terms the Torped 42 is slower, but does more damage than the Mk-46. The HKP-4C had a rear-mounted radar, which was deployed by lowering the rear ramp (which is not allowed by the game engine at the moment).
If you publish a scenario using this mod, do not forget to indicate in your description that in order it works the players need to subscribe to this mod first ;).
Moloti made an excellent Swedish Navy Pack, featuring Swedish Cold War surface vessels and submarines.
Available here: https://steamcommunity.com/sharedfiles/filedetails/?id=3560954782&searchtext=Swedish
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Important (about mods and mods use):
It is a truth universally acknowledged, that mods can break early access games.
Jane AustenThis mod has been tested and is running perfectly on my computer (i7-11800H @ 2.30 Ghz – 16 GB RAM – NVIDIA GeForce RTX 3050) with no other mod enabled. However, since they are as many computer configurations than computer users, it’s unfortunately impossible to guarantee it will work on yours.
Be aware that by installing mods for Sea Power, you are modifying your game experience from the original intended product which is still, at this mod’s release date, in EARLY ACCESS. Therefore, later game updates/patches may cause this mod to be deprecated. Although it is unlikely, the presence of other enabled mods might cause conflicts, and the more enable mods on your computer, the greater the chance of conflict. So, to sum it up, USE MODS AT YOUR OWN RISK.
If you wish to clean uninstal this mod make sure to follow these steps: 1) Uncheck this mod in the mod manager. 2) Click on Accept. 3) Unsubscribe. Then make sure the mod’s file is no longer in the C:Program Files (x86)Steamsteamappsworkshopcontent1286220 folder.
