Automatic trim apparatus

Abstract

A trim adjustment system includes a means for sensing the depth of the water over which a power boat is traversing and automatic means for raising the propeller and shaft of the boat motor out of danger of the propeller and shaft from becoming damaged by contact with the bed of the water.

1 . A system for automatically moving a motor of a boat to a position to avoid damage to the motor in response to change in the depth of the water over which the boat is traveling, said system comprising:
 a) means for sensing the depth of the water being traversed and   b) means for calculating the necessary position of the motor to extend into the water at a safe depth less than the depth sensed by the sensing means and   c) means for moving said motor to said position.   
   
   
       2 . The system as defined in  claim 1  and in which said moving means includes trim adjustment means for moving the motor away from and toward the boat.