When reversing out of a berth (in a Maramu, Mango, SM, and 54) when you are bow-in, you have very limited control of the stern, especially in the beginning. With any crosswinds, you'll likely go in a direction different than you intended. Even trying to point the stern using the bow thruster is limited with the bow because of the side limitations of the slip. Of the Amels I mentioned above, and in the conditions above, the Maramu stands a better chance of reversing from a berth with crosswinds because of less windage.
And when stern in, bow out, the thruster steers the bow for tight turns in narrow fairways at even zero speed. As the speed increases and the berth is cleared by the stern, the rudder can turn the stern while the thruster steers the bow.
I mentioned crosswinds above. Remember crosswind gusts can come out of nowhere and when conditions are calm.
Although I know that most people don't do it, I always dropped the Bimini on a Super Maramu when manoeuvering into a berth...and with a dinghy on the mizzen deck, I always wanted to have crew tell me distance between the stern and dock. I preferred hand signals indicating distance in meters.
CW Bill Rouse
Admiral, Texas Navy
Amel School www.amelschool.com
720 Winnie St
Galveston Island, TX 77550