MIL-STD-209K, DEPARTMENT OF DEFENSE INTERFACE STANDARD FORLIFTING AND TIEDOWN PROVISIONS (22 FEB 2005)., This standard establishes dimensional limits, design considerations, positioning requirements, and strength requirements for lifting (to include helicopter sling load (HSL)) and tiedown provisions for lifting or tying down tanks and other tracked vehicles, tactical wheeled vehicles, helicopters, and other military equipment shipped assembled or disassembled in unboxed or uncrated condition, and for restraining cargo or accessories to such equipment. The lifting and tiedown requirements in this standard are necessary to permit compatibility between military equipment and the transportation systems used for deployments.