I can tell you its a lot easier said than done!
Yes & no! I think it's like the first time you put on skates. Very difficult until you get a feel for it. That's why helmsmen should practice this skill away from obstacles. I think another huge factor is the underwater profile. With my full keel contiguous with the rudder, I track very well into the current, but I can't back down a fairway in a marina like those fin keel boats. I would suspect that fin keel boats that have that quick turning axis might have much more difficultly ferrying. 'take care and joy, aythya crew