As shown in the illustrated electrically operated watertight door controller, how is the rotation direction of the door motor reversed? Illustration EL-0115

Correct Answer: Option B — reversing the direct current direction through the motor armature and maintaining the same direct current direction through the motor series field

Under USCG National Maritime Center examination standards, the accepted correct answer is: reversing the direct current direction through the motor armature and maintaining the same direct current direction through the motor series field.