Regal 3300 Owner's Manual page 146

CHAPTER 5
Backing Down
The twin powered vessel can use the throttles to slow down one or
both engines as a help to steering when maintaining sternway. As an
option, the skipper is able to stop one set of propellers for a higher
control factor in reverse.
Stopping
The best way to stop a twin powered vessel is by reversing the propellers.
This action will not push the stern to one side like other type powered
vessels.
The skipper of a twin powered boat can use the following approach
idea in both port and starboard situations; with the boat stopped,
the skipper can reverse the drives so the stern will be pushed toward
the dock. With the starboard approach, reverse the outboard drive to
check headway when approaching parallel to a dock which will cause
the stern to move in. With the port approach, the reversing starboard
drive will move the stern toward the port. When approaching to
put the vessel's starboard side to the pier, the reversing port drive
propeller will move the stern toward starboard.
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