The u. s. coast guard requires certain equipment be carried onboard a vessel based on the vessel's length. how must an operator measure the length of their vessel?

The US coast guard requires certain equipment be carried onboard a vessel based on the vessel's length. The following option is correct when it comes to how an operator must measure the length of their vessel:
From the outside of the bow to the outside of the stern ( not including the motor)
This way, he will make sure that the equipment can fit the vessel.