The next evening, just before I fell asleep, I realized why the compass should be on the port side. It should be as far as possible from electrical instruments and the switch panel in order to protect it from magnetic stray fields!
For a few days I wondered if I should take the risk of installing instruments and compass so close together. Then I decided to do it not. So I sawed a second compass cutout on the port side.
|One compass but two cutouts|