How do you Get Accurate Range with No Map Contacts On

[Maki4444]

Originally Posted by jason210

I know what you mean. I'm making some slide rule type instruments for this, the main goal being ease of use.

Great job Jason, can't wait for it I generally have the feeling that all of these methods while in fact correct weren't used in real life and that subs relied mainly on radio contact reports. Just look at Das Boot or read Iron Coffins, there is no mention of a sub laying low listening to the hydro and then you know just triangulating the course :P

[jason210]

Originally Posted by Maki4444

Great job Jason, can't wait for it I generally have the feeling that all of these methods while in fact correct weren't used in real life and that subs relied mainly on radio contact reports. Just look at Das Boot or read Iron Coffins, there is no mention of a sub laying low listening to the hydro and then you know just triangulating the course :P

I honestly don't know how they did it back then, but I do know that during the cold war and today computers do this kind of analysis, and sims like sub commander and Dangerous waters let you do this passive sonar plotting graphically. However, passive sonar is very good for giving you an idea of range and heading of a convoy, which must have been useful.

Btw, here's a link of my torpedo calculator:



This version works fine, but I have since tidied it up a bit. For example that text has been removed, and replaced with other information. The part (b) is wrong also because this device won't work for gyro angles - it can give you the pseudo torpedo track but that isn't useful, so torpedos must be fired at 0 gyro angle when the target aappears at a specific periscope angle. I might add a slide rule down there also, for estimating speeds.

I will release it on my website as a free downloadable kit, and also as a ready-assembled product that you can buy. It will only be cheap, but I think with the free kit there may be a problem attaching the rotating parts because this requires the use of a riveter - not something we all have access to.

[Michael13]

Originally Posted by Maki4444

Great job Jason, can't wait for it I generally have the feeling that all of these methods while in fact correct weren't used in real life and that subs relied mainly on radio contact reports. Just look at Das Boot or read Iron Coffins, there is no mention of a sub laying low listening to the hydro and then you know just triangulating the course :P

Well, they was, but they made it by different way. Pursuing ships/convoys whole day (sometimes few days) at safe distance, watching their behavior, calculating average speed and course and etc.