A sailboat mast stepping system for efficiently using mechanical aids to raise or lower the mast of a sailboat. The sailboat mast stepping system includes a base, a support member substantially housed within the base, a catch member positionable at the end of support member opposite the base and an actuator. Activating the actuator manipulates the support member with respect to the base.

 
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< Stabilized watercraft such as a trimaran

< Method for installing a self-floating deck structure onto a buoyant substructure

> Drilling-workover vessel having a drill string extending through at least one swivel

> Large diameter mooring turret with compliant deck and frame
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