Lights
Thank you Ronald. Information about tug lighting is always useful they are so complicated dependent on tug’s length, length of towing hawser, etc. Nav lights on all boats must be displayed beginning at dusk so it makes total sense that the same applies to towing lights. Day shapes are another complexity.
Then there are lights for other burdened vessels such as fishing draggers, or vessels unable to respond to the helm.
Lights & day shapes are indeed a challenge for those sitting for their maritime licenses.
The tug in the photos is very interesting. Do you have any more photos or info about it?