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Plotting tools I have Known:

When I worked on large ships. I used really good parallel rules and
dividers. Cheap parallel rules are too wobbly.  A US trained mate told
me about the 2 triangles, but I never tried them out. Dividers were
great for loran c interpolation too.

When I learned to navigate in small airplanes, I learned to use a small
(4 inch?) circular protractor with a string through it.  I also had a
square protractor. I knew the distance between my thumb and forefinger
on standard maps, as well as the width of my fingers. I often had my
maps in plastic cases and wrote on them in grease pen. I always like the
fact that you are always calculating drift for aircraft, whereas it is a
given in Transport Canada Marine Navigation exams, but when did exams
ever have much to do with reality?

 In Canada, we still have oral exams after the written ones.  I can just
break out in a cold sweat thinking of them.  I still have stacks of old
Nav. Safety multiple choice exams tucked away in case I decide to renew
my tickets.

I transfered the small tools from aircraft to small boats. They work
well if you are short on space.

Bruce

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