This is the underwater profile of the M39. I find that she backs up pretty well providing you have the cojones to give her a bit of throttle. It can be a tadge alarming in close quarters but she is quite controllable. Mind you having a bow thruster as backup has made me less of a wee timorous beastie than I might otherwise be.
Not, I must add as controllable as the fin and spade of Raven. She backed up like a car. Fast or slow, no worries.
Boat I had before Raven was full keel cutaway forefoot. Reverse ? Don't be silly.