Container Transport Locks. The locks (6) are used to brace the M3Al CROP inside an ISO
container and are located at the two front comers. No further shoring is required to secure the M3A1 CROP inside
an ISO container. The locks engage the vertical shoring slot inside the door of the container.
Twistlocks. Twistlocks (7) are located at each comer and allow six empty M3Al CROPs to be
stacked and locked together. Each CROP is secured by the twistlocks (7) of the CROP directly beneath it.
Stowage Boxes. Three large, lockable stowage boxes (8) are located in the deck toward the
rear of the M3A1 CROP. The lids on the stowage boxes (8) are of the same material as the deck.
Rollers. Rollers (9) are located at the bottom rear of the M3A1 CROP. Rollers (9) are used for
loading/unloading M3A1 CROP onto the trailer, and to roll into and out of an ISO container. Rollers (9) can be
replaced if damaged.
Tiedown Rings. A total of 38 10,000 lbs (4,563 kg) capacity tiedown rings (10) are provided
MIL-STD-209, Class 3 Multipurpose Rings. Four 72,500 lbs (32,915 kg) capacity multipur-
pose provisioning rings (11) are provided (two on each end) for sling lifting and securing on railcars or flatbed
Use load restraint plates in upright position when carrying cargo on deck of CROP.
Load Restraint Plates. The M3A1 CROP has six load restraint plates. The left- and right-front
restraints (12) are removable and can be stowed on the deck. The center restraint (13) is welded in place. The three
rear restraints (14) are hinged and must be lowered to the stowed position to allow M3A1 CROPs to be stacked.
Rail Transport Pins. The CROP is equipped with four rail transport pin holes in each rail, three
for use on the PLS trucks, and one hole for use on the PLS trailer. During preparation for rail transport, the CROP
should be secured to the truck and/or trailer with these pins.