I have sailed a 37 foot Nauticat with a bow-thruster. In big currents and cross winds in tight quarters going stern-to, it was a god-send.
I also teach power boating. With the massive windage that some have, the bow-thruster is almost mandatory. A single screw trawler makes both bow and stern thrusters very nice luxuries.
ISPA Yachtmaster Offshore Instructor Evaluator
Sail Canada Advanced Cruising Instructor
IYT Yachtmaster Coastal Instructor
ASA 201, 203, 204, 205, 206, 214
As I sail, I praise God, and care not. (Luke Foxe)