A structure includes a bracket and a vertical member. The vertical member includes a vertical member top end and a vertical member bottom end. The vertical member is affixed to the bracket. The structure further includes at least one bumper. The at least one bumper is affixed to the vertical member bottom end via a bumper connecting structure. The structure further includes an arm member. The arm member includes an arm member first end and an arm member second end. The arm member second end is affixed to the vertical member top end. In another aspect, a structure includes a support, and affixed to the support, a bracket. The structure further includes, affixed to the support via a bumper connecting structure, at least one bumper. The structure further includes, affixed to the support, an arm member.

A rig skidding method involving raising a rig on jacks, positioning skid tracks comprising low friction plastic underneath the rig, lowering the rig, and skidding the rig along the skid tracks to a new site for rig operations. At the new site, the process is reversed to leave the rig on the ground at the new location.

A platform boat lift safety shut-off apparatus includes a flexible safety cable supported below the fixed deck of the lift and operatively connected to the motor or other drive system of the lift through a shut-off switch. The cable is assembled and positioned such that during elevation of the lift platform, the body part of a person extending over an edge of the platform engages the cable and exerts a force on the cable, which operates the switch to deactivate the drive system and stop elevation of the platform before the platform reaches the level of the fixed deck.

A platform boat lift safety shut-off apparatus includes a flexible safety cable supported below the fixed deck of the lift and operatively connected to the motor or other drive system of the lift through a shut-off switch. The cable is assembled and positioned such that during elevation of the lift platform, the body part of a person extending over an edge of the platform engages the cable and exerts a force on the cable, which operates the switch to deactivate the drive system and stop elevation of the platform before the platform reaches the level of the fixed deck.