Originally Posted by denis_469 (Post 2495761)

"In the first half of 1969, an experimental Soks "Snegir" was installed on it. In September-October of the same year, as part of the Pacific Fleet exercises, the boat was engaged in the search and tracking of the US Navy's nuclear submarines in the Philippine Sea and on approaches to Fr. Guam. K-14 managed to track one of the ships of the probable enemy with the help of this system for almost 40 days. Due to this success, Soks "Snegir" was developed and subsequently one of its modifications was installed on domestic third-generation nuclear submarines."
K-14 is submarine project 627A (NATO - November). It was US submarine "Benjamin Franklin" class. Our sub start tracking when US sub go from Guam and continue before US sub return to Guam base.

It is 1969 year. First non acoustic system. During this patrol "K-14" few times go to US sub for acoustic contact. "K-14" not need acoustic contact with US sub and know where US sub was.

Originally Posted by Ansgar Burkhard (Post 2495803)

Yes, as I suspected they picked up a trail bear a bas where it is expected for a submarine to try and leave. As I said, SOKS research, although largely dismissed in the West until very recently, is still classified by the Russian authorities. I would love to get my hands on it. If you have more info from Russian sources on wake detection please feel free to post it.

Originally Posted by PL_Harpoon (Post 2501031)

I have a small question to the guys "in the know".

Looking how the torpedoes behave in the game vs other sub sims I began to wonder how do torpedoes behave when they acquire a target.
Do they turn straight for the target or do they somehow can calculate (or get data from ship if wireguided) it's speed/course and go towards the "meeting point"?

Originally Posted by Wiz33 (Post 2501086)

Not someone in the know but logic would say that they head straight for the target as sonar only gives a bearing but no course and speed. Sure, with the wire still attached, you can probably steer it but I would think the the difference in fuel usage between a curve or straight course during the terminal homing phase is probably going to be minimal

Originally Posted by PL_Harpoon (Post 2501031)

I have a small question to the guys "in the know".

Looking how the torpedoes behave in the game vs other sub sims I began to wonder how do torpedoes behave when they acquire a target.
Do they turn straight for the target or do they somehow can calculate (or get data from ship if wireguided) it's speed/course and go towards the "meeting point"?

Originally Posted by TigerDude (Post 2501174)

They head straight to the target. There is no course-prediction capability, nor would you want one.

Originally Posted by TigerDude (Post 2501174)

Dead reckoning of the fish is used to determine for the fire control team where it is when it acquires. The torpedo starts "Range-gating" where it immediately pings when it gets a return. The time of pings corresponds to a distance from the torpedo using speed of sound in water. Add the 2 together to get true range to the target.

This is also a way to get the range of a torpedo that has acquired you.

It is quite un-nerving to be in a boat when a torpedo is range-gating on you. I experienced this is the sonar shack when we steered a practice fish 180 on the test range to prevent it from running into a wall. You maintained depth separation, but it was pretty eerie. The active-intercept receiver makes a high-low tone that gets progressively closer together.

Originally Posted by TigerDude (Post 2501174)

They head straight to the target. There is no course-prediction capability, nor would you want one.

Originally Posted by MBot (Post 2501333)

Nor would you need one. Do torpedoes not use proportional navigation? Air-air missiles use this technique since the 50s. Turn until the bearing-rate is zero and you are on a collision course.

Originally Posted by PL_Harpoon (Post 2501031)

I have a small question to the guys "in the know".

Looking how the torpedoes behave in the game vs other sub sims I began to wonder how do torpedoes behave when they acquire a target.
Do they turn straight for the target or do they somehow can calculate (or get data from ship if wireguided) it's speed/course and go towards the "meeting point"?

Originally Posted by MBot (Post 2501333)

Nor would you need one. Do torpedoes not use proportional navigation? Air-air missiles use this technique since the 50s. Turn until the bearing-rate is zero and you are on a collision course.

Originally Posted by Wiz33 (Post 2501373)

Radar guided missile do that because they are guided by the plane's radar which have the target's course and speed. IR homing missile is always a lag pursuit.

Originally Posted by MBot (Post 2501402)

That is incorrect. Most famously, the Sidewinder employs proportional navigation.

Originally Posted by Wiz33 (Post 2501515)

Proportional navigation is still a form of lag pursuit as in the missile fly in a curve line. New missiles like the AMRAAM flys straight towards the predicted target location upon intercept.