Yep, another sunrise/sunset topic.

[Von Due]

After searching the forums and getting the moon/sun table I am still wondering how this works in SH3.

For one, the game world is flat and rectangular but still I am going with the degree marks on the nav map trying to figure out how to come to agreement with the rest of my crew when the sun sets and rises. I am using the interior light switch as indicator.

Testing, I sailed off to E 0* 0' N 60* 0', got there 3. August 1939. Submerged in time to position myself within no more than 5 metres from the actual spot.

3. Aug. Sunset 2117 GMT
4. Aug. Sunset 2108 GMT

7 minutes difference.

I understand how the sunset hour changes as the days go by but 7 minutes from one day to the next seems a bit much. Is the switching to night lighting a good enough indicator or should I have watched the sun set myself?

Digression:
The next sunrise, Immediately after the lights went to day lighting, I got the true bearing to where the sun rose. It was close to 54*
At 1200 GMT I noted the sun's true bearing at about 166*
In a whim, I looked at these angles:
90* - 54* = 36*
180* - 166 = 24*

36* + 24* = 60* which happened to be my latitude. Question that needs answering is whether this was a coincidence or not. The thought is that the true bearing will be offset from due east the further away from the Equatoral line I get. I want to see how much that offset is at various latitudes. The offset from due south at noon is more puzzling. I haven't got a clear idea what's causing that.