If the outer perimeter of the installation has adequate
security fencing, then fencing of inner zones may not be required.
If the outer perimeter of the installation has barbed wire
or hog-wire fencing or no fencing, security fences for inner facilities or
storage areas may be more practical and cost-effective.
If the outer perimeter of the installation is partially
fenced with a security fence, it may be more cost-effective to provide
security fencing for the remainder of the outer perimeter rather than install
security fencing around inner restricted areas.
If natural barriers such as mountains, cliffs, rivers, seas,
or other difficult-to-traverse terrain form portions of the perimeter, then
security fencing of the inner restricted areas may be more practical and cost-
effective than providing security fencing either along or through these
In some cases, a request for a permanent exception to fencing
requirements submitted in accordance with OPNAVINST 5530.14B may be more
appropriate than erecting costly security fencing.
Fencing Modifications. Existing serviceable 6-foot (1.8-meter
(m)) chain link fences (without outriggers) and gates constructed under the
old version of OPNAVINST 5530.13A requirements do not need to be modified or
replaced to meet the new OPNAVINST 5530.13A, 7-foot (2.1-m) (without
Increasing the height of chain-link fencing by 1 or 2 feet (0.30
or 0.61 m) may, at best, increase the time to penetrate by going over the
fence by only a couple of seconds. However, it has no effect on the time to
penetrate the fence by cutting.
Cost of Security. Generally, physical security cost expenditures
should be based upon the cost of the item to be protected, possible damage
that the loss of the item could inflict upon the civilian population, and the
importance of the item to the overall security and readiness posture of the
command. The cost of security is frequently greater than the dollar value of
the property or material protected. Sensitive items that may be a threat to
the civilian population or vital to national security will be provided
additional protection commensurate with their sensitivity and the threat to
their loss or destruction.