Hi Folks,
Tow lights are for commercial tows only.
In the USCGAux, we do not have lights. If we tow at night, we flash a light on the towed vessel. During the day and night, we have lookouts looking for anything that may interfere with our towing, and will answer the problem by getting out of the way, shorting the tow line, (in calm water we will use a side tow.) or use the radio.
To get an idea what the Commercial Tows do, while making a run down Buzzards Bay in fog, a Tow Captain was telling everybody on channel 16 where he was, where he was going, and warning anybody who might get in the way. For a time, he was calling out to a boat that was coming out of South Dartmouth, warning them that they were steering in harms way. The boat finally turned, and he thanked them for changing their course.
As for me, I calculated that I was going to be heading into New Bedford before he got opposite New Bedford. This was based on his announced course, speed, and where he was at (a buoy at the beginning at Buzzards Bay.) The pros also monitor channel 13. Other boats in the area also announced where the were. All quite interesting.
Fred