Re: Backing up (or not)
I've had the fun of re-learning how to back up. The Gemini had a drive leg that turned with the rudder so it was easy-peasy, sort of like driving a car.
The Irwin has a 2/3 full keel (quesstimate) that is all of 18 inches down from the hull and a foot thick - not exactly a blade. I had to get over my chicken nerves and decide to MOVE the boat then turn. Not easy in a tight channel at a marina.
I've found that if I goose a 2/3 throttle for a second then back to idle the boat gets moving and stays moving fairly straight. I have a Maxprop so in theory I have no prop wash - in practice I have minimal prop wash.
Lessons learned are opportunities earned.