TM 9-3990-260-14&P
Section II. OPERATION UNDER USUAL CONDITIONS
2-8. M3 CROP ASSEMBLY AND
PREPARATION FOR USE.
a. Unpacking. Refer to
Para 4-4, Unpacking and Packing,
for unpacking instructions.
b. Assembly and Installation. The CROP is delivered fully assembled.
Procedures for unlocking and locking twistlocks are covered in stacking and unstacking procedures, paragraph 2-14.
the twistlocks are used to secure stacked CROPs. They are not ISO compatible.