6.1 Adequate permanent securing devices shall
be provided to prevent movement of the packages within the cargo spaces.
In designing permanent devices, due consideration shall be given to
the orientation of the packages and the following ship acceleration
levels shall be taken into account:
- 1.5 g longitudinally;
- 1.5 g transversely;
- 1.0 g vertically up;
- 2.0 g vertically down.
6.2 Alternatively, where packages are carried
on the open deck or a vehicle deck, they shall be secured in accordance
with the principles of safe stowage and securing of heavy unitized
and wheel-based (rolling) cargo approved by the Administration based
on the guidelines developed by the Organizationfootnote.
6.3 Collision chocks, where used, shall be so
arranged that they will not interfere or prevent cooling air flow
which may be necessary under the provisions of 4.1.