This technique has a lot of advantages as the outside sternline has more power against the wind. We show how to rescue a situation hanging the leeward moorings.
The APPS we use can be bought here:
https://www.blue-2.at/produkte-en/
We are using Boat Docking 2.0: (IOS, Android, Windows and Mac) and
Virtual Skippertrainer (Boat docking Simulator).