Marine deputies cannot back a boat trailer

I've been in trucking for almost 45 years, so I can back up quite well. I about got my head handed to me once when a guy at a boat ramp was having this kind of trouble and I kindly offered to help. Yikes, that set off the nuclear foaming-at-the-mouth profanity laced response! He never did get it in the water, after about 20 minutes of clogging up the ramp he gave up and went home.