MCO 3500.42C governs Marine Corps helicopter rope suspension technique and cast operations, including training, equipment, storage, and reporting.
View MCO 3500.42C on armypubs.army.mil
MCO 3500.42C establishes authorization and qualification requirements for HRST Masters and related personnel, along with unit training and operational requirements. It requires controls for equipment use, modification, storage, inspections, record keeping, and reporting malfunctions and incidents.
Applies to: Only those units/activities having mission essential requirements, as indicated by their T/O mission statement and appropriate allowance in their T/E are authorized to possess the equipment for the conduct of HRST operations.
Only those Marines who have graduated from a USMC authorized course of instruction for HRST Master or other service training courses for helicopter/tiltrotor aircraft rope suspension may be designated as a HRST Master. (paragraph 2)
Only equipment found in reference (m), the ANUL and in appropriate Marine Corps stock lists is authorized for use by Marine Corps personnel for HRST operations. (paragraph 1-1)
The use of personally owned ropes, carabineers, and descenders during HRST operations is prohibited. (paragraph 4)
All HRST/Cast training will conduct tower/pool training before conducting live helicopter/tiltrotor aircraft training if members are not current. (paragraph 2)
HRST equipment found to be defective will be reported to CG, Marine Corps Logistics Command (LOGCOM) via the online Product Quality Deficiency Report (PQDR) process. (paragraph 6)