130. What statement is true concerning the purpose of an independent main thrust bearing where used?

The main purpose of the main thrust bearing is to absorb radial thrust and maintain the shaft in proper radial alignment.
The main purpose of the main thrust bearing is to absorb axial thrust and maintain the shaft in proper axial alignment.
The main purpose of the main thrust bearing is to absorb axial thrust and to transmit the axial thrust developed by the propeller to the ship's hull.
The main purpose of the main thrust bearing is to absorb radial thrust and to transmit the radial thrust developed by the propeller to the ship's hull.

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