I started this mission at 0°N 45°W in nautical time zone +03, which is now my base time zone, or BTZ. SH3 attempts to display the local time as the mouse time and the GMT as the screen time, but they are wrong. They are both offset from the correct time by the BTZ. I cruised from the starting position East making observations of sunrise and sunset.
Displayed above are the sunrise and sunsets together with the almanac data for the positions on those dates. If you add the BTZ to the dates SH3 displays, you will match the almanac times of sunrise and sunset.
Below are the results when I started at 0°N 45°E with BTZ -03 and cruised West.
