all right the first is to find longitude with the sun:
it has 3 needels:
1 that rotates with the sun, every 24 hours, a basic clock
i that aims north, a compass
and one that the user aims to the sun
all right the needel clock shows 12 gmt
you set the device aiming north by putting the compass nedel in its right position
and you aim the third needle to the sun
lets suppose it shows 1100, the third needle i mean
well you know youre one hour offset from gm or 0 longitude
i dont rememebr would be one hour be 15º or 20º?
well the 2nd gauge if this doesnt get locked so plz dont report