(5) The systems/means used to comply with Option (1), Option (2), Option (3), or Option (4) of this section are designed by a licensed marine engineer, or registered professional engineer familiar with floating crane/derrick design.
Exception to subsection (e):
For mobile auxiliary cranes used on the deck of a floating crane/derrick, the requirement specified by subsection (e) to use Option (1), Option (2), Option (3), or Option (4) does not apply when the employer demonstrates implementation of a plan and procedures that meet the following requirements:
(1) A marine engineer or registered professional engineer familiar with floating crane/derrick design develops and signs a written plan for the use of the mobile auxiliary crane.
(2) The plan is designed so that the applicable requirements of this section are met despite the position, travel, operation, and lack of physical attachment (or corralling, use of rails or cable system) of the mobile auxiliary crane.
(3) The plan specifies the areas of the deck where the mobile auxiliary crane is permitted to be positioned, travel, and operate, and the parameters and limitations of such movements and operation.
(4) The deck is marked to identify the permitted areas for positioning, travel, and operation.
(5) The plan specifies the dynamic and environmental conditions that shall be present for use of the plan.
(6) If the dynamic and environmental conditions in exception (5) are exceeded, the mobile auxiliary crane shall be attached physically or corralled in accordance with Option (1), Option (2) or Option (4) of subsection (e).