How do you determine the target's heading with passive sonar?

Puster Bill · 08-06-08, 07:56 PM

It's not quite historical, but you could make a bearing rate computer. It's a circular slide rule that was used in the 1950's-1980's to do the calculations.

Here is the inner wheel:

And here is the outer wheel:

The parts where it looks messed up are the parts where I had to erase the "cursor" on the illustration (I pulled it from a navy manual online somewhere). You can clean it up if you want, but it works fine as-is.

Obviously, you print them out and then make a cursor for them, then pin it all together in the center.

I don't have the instructions handy, but if you google "bearing rate computer" you should find it. The procedure does work, but I don't do it anymore because it isn't historical (at least, not WWII German historical).

08-06-08, 07:56 PM	#6
Puster Bill Grey Wolf Join Date: May 2006 Location: BA8758, or FN33eh for my fellow hams. Posts: 833 Downloads: 0 Uploads: 0	It's not quite historical, but you could make a bearing rate computer. It's a circular slide rule that was used in the 1950's-1980's to do the calculations. Here is the inner wheel: And here is the outer wheel: The parts where it looks messed up are the parts where I had to erase the "cursor" on the illustration (I pulled it from a navy manual online somewhere). You can clean it up if you want, but it works fine as-is. Obviously, you print them out and then make a cursor for them, then pin it all together in the center. I don't have the instructions handy, but if you google "bearing rate computer" you should find it. The procedure does work, but I don't do it anymore because it isn't historical (at least, not WWII German historical). __________________ The U-Boat Commander of Love