[ARC5] YG/ZB

[Mike Morrow]

Jack wrote:

>Couple of oddball facts gleaned from the YG manual.
>
>The system sent course information for 9 revolutions, or
>4.5 minutes, then an ID for 1 revolution or 30 seconds.
>
>The course signal were the morse characters
>A D F G K L M N R S U W.  One character sent twice
>in each 30 degree sector.
>
>The ID signal consisted of 2 characters of
>
>B C J O P Q X Y.

The disk set shown at the website that Ken referenced: 

 http://jproc.ca/rrp/rrp3/avenger_ye_zb_mcode_disk.jpg

has the sector ID segments arranged as Jack listed, and the station ID
segments arranged to the right of the disk.  (Z is also included there.)
The disk set in the photo must have been new and unused!

I wonder where that disk came from.  There weren't a lot of surplus
YE and YG sets on the market after the system was abandoned in the
mid-1950s.  :-)  I wonder if any survive intact on a museum ship or
elsewhere today.  It's a shame if not.

Mike / KK5F