(pine,
Disaster Defense Plan
CJTF SEVEN No, 1-54
(1) CONDITION III - Winds of fifty (50) knots or more anticipated
within a forty-eight (48) hours.
(2) CONDITION II - Winds of fifty (50) knots or more anticipated
within a twenty-four (24) period.
(3) CONDITION I - Winds of fifty (50) knots or more anticipated
within twelve (12) hours.
c, A tidal wave bears no relation to the oceanic tides but is the result of extremely large displacements of water in the ocean caused by
earth slippage. Most tidal waves in the Pacific originate in the Gulf
of Alaska, where earth slippages are not rare. The destructive energy
released by a tidal wave occurs when it enters shallow water, increases
in height very abruptly and breaks on or near the shore line. Destruction associated with such a wave is caused by the rapid rise in water
which undermines foundations, collapses structures and drowns personnel. The difficulty in coping with a tidal wave stems from the fact
that it cannot be seen in deep water and that it moves at such a high
rate of speed. The primary means by which the existence of a tidal
wave is determined is through the observation of earth slippages by
the use of seismographs. A seismograph warning net exists in the
Pacific and ATCOM, ENIWETOK will receive warnings from CINCPAC or the
Commander, Hawaiian Defense Command (COMHAWDEFCOM).
The following
characteristics of ENIWETOK and BIKINI ATOLLS serve to decrease the
probability of serious damage due to the effects of a tidal wave:
(1) The base structure of the atolls rises abruptly from the sea-
ward sides. Therefore, topographical features such as long shelving
approaches or confining hill or harbor structures are absent.
(2) Both atolls are approximately 2,000 nautical miles removed
from the Pacific "earthquake belt" in which most Pacific tidal waves
originate.
(3) The most probable direction of approach by a tidal wave is
from the north and since all major camp sites are in the southern part
of each atoll the effects would be somewhat reduced.
nr a
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Seip
d. The title "task group commander", as employed in this plan, includes the Headquarters Commandant, JTF SEVEN.
Mission.
The mission of CJTF SEVEN as Atoll Commander, ENIWETOK
. CATCOM, ENIWETOK), in the event of a natural disaster, is:
a. To provide for the security of government and private property in
the forward area.
b.
To protect national security by safeguarding all security informa-
tion and material, particularly RESTRICTED DATA and TOP SECRET matter,
against loss, destruction and compromise.
ce. To provide for the destruction of security information and material, particularly RESTRICTED DATA and TOP SECRET matter, in the event
all safety measures have failed. See Security Memorandum No. 6, Hq
JTF SEVEN, dated 13 September 1953.
Tasks For Subordinate Units. Upon announcement by ATCOM, ENIWETOK of
disaster conditions, Headquarters Commandant, JTF SEVEN, will coordinate the designation of safety areas on PARRY ISLAND.