"B.C. Mallam" wrote in message

In the early 60's we used a CHART PLOTTING BOARD Mark 6A, it was about 14"
by 14".

Ayup. I was taught and used in the S2 'till that platforms retirement in
'75. I know this 'cause I taught it!!!!! ;-)

The ships course and speed and the flight plan could be plotted at
the same time. It was a hand job but it worked, most of the time.

It did require some "position sense" and somebody with a quick pencil. When
the ASN-30A worked it was great. But that device had a two cat
shot/arrestment warranty. :-( So you had to be ready with your backup.

If it
didn't you started a square search at the point you were suppose to meet.

That was one way. Another was to drop a CODAR pair or a DIFAR bouy and look
for the "singing screw" on Mother.

Also it opened up and was a good place for porn pictures!

I guess this kind of ties in the "singing screw."

Bill Kambic

VS-27, VS-30, VS-73, FASOTRAGRULANT