Hi Hendrick
If you have done training and exams and have acquired a skippers license under category E
and registered your boat for seaworthy by a safety officer under category E
Then you can launch your vessel and operate it the harbor during the day or night
Provided that your boat meets the requirements of night operations
(nav lights, anchor lights, deck lights, extra battery) etc
With regards to fishing in the harbor at night, the skipper should be well versed in night navigation, know the difference marker bouy lights and stay out of the shipping lane, restricted area etc
Only those bigger vessel that launch at night and going deepsea fishing , the boat and skipper operating the vessel should have both - category B with night rating
I did not see a problem with category E fishing in the harbor
At night
Please double check with the safety officer at the meerensee boat club or Rbs club
Thanks