Submarine Attack Course Finder (a.k.a. Is-Was / Banjo)

[don1reed]

My take on this neat addition to whiz-wheels is:

You have 3 templates:

A (the big outer wheel) = True compass

B (middle wheel) = Submarine (all bearings relative)

C (inner wheel) = Target

Scope (transparency) = cursor

Here is a copy of my old orig SH1 whiz-wheel,



as you can see, (forgive the blurriness), I've set it to the params of the problem. You need to do the same with the new wheel.

Cheers,

[Igorry]

Originally Posted by don1reed

My take on this neat addition to whiz-wheels is:

You have 3 templates:

A (the big outer wheel) = True compass

B (middle wheel) = Submarine (all bearings relative)

C (inner wheel) = Target

Scope (transparency) = cursor

Here is a copy of my old orig SH1 whiz-wheel,



as you can see, (forgive the blurriness), I've set it to the params of the problem. You need to do the same with the new wheel.

Cheers,

Hi Don1Reed,

I have also constructed your whiz wheel and I believe the outer wheel is your submarine and the middle wheel is the true compass and the inner wheel is the target. Using your whiz wheel I can get the true course of the enemy ship or the enemy AOB with three piece of information

For true course

1) your sub course
2) relative bearing
3) Estimated AOB

For AOB

1) your sub course
2) relative bearing
3) True course of enemy ship


Basically the course finder or whiz wheel is the same as the banjo. I like the banjo better because it has the periscope tab and it is an exact copy of the ww2 banjo. However both can be used to find true course or AOB.

Igorry