Re: Bow Thruster Amps rating.
I certainly will share what I land on here.. Also In the Class-T vs ANL. The Class-T max out at 400A (what you have and seems to be working).
I chose ANL due that I can put one on at the the Amp rating that will match the bow thruster (thus my original question of this thread). I guess I will find out if it blows! It seems here there is not a write or wrong- but it is good to see others being safe as well.
Here is a good guide I found to fuses, use, and sizes.