On Thursday, 23 March 2017 12:28:31 UTC, Graham P Davis wrote:
we had special
plotting pens having a single (red) handle with two nibs. I think they
were of German design - or so I was told.

Oh wow, I've never heard of those before! I was one of those who used biros taped together to plot the European chart as far east as there was data available (Wyton) and used to stick the Molfax wet fax chart to a larger North Atlantic paper chart and plot the ships :-)

--
Freddie
Fishpool Farm
Hyssington
Powys
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