“Leaning out” is the layperson term that comes to mind, but I’m supposing a technical and standardized term exists:  indirect towing.

Let’s watch the evolution with Capt. Brian and OOCL Berlin. At 12:01, the line is slack.

12:02. As the tow approaches Bergen Point, line is tightened and

by 12:04, the line lengthened, and the tug appears to be headed in a diametrically opposite direction, in spite of OOCL Berlin‘s much larger mass.

Capt. Brian is now using the hull as a brake.

 

Three other tugs are working alongside the ship.

A different day, Capt. Brian is working on Gjertrud Maersk using the same technique.

 

 

All photos and conjecture on the language by Will Van Dorp.   Here’s one of my sources.  I hope someone corrects or confirms my understanding here.