Order number 940406-171827-13
page 59
set 5 with 102
OFFICIAL-USE ONLY
of:
consisted of a 12 to 18-knot breeze and a short 3-ft
chop from the northeast
superimposed over @ 300-ft long,
6 to 8 ft high swell from the east southeast. Each
mooring consisted of a 1500-1b anchor connected by a
5/32-in., 1 x 19 galvanized steel cable to a 36 to
4l-in. diameter buoy 150 ft below the surfacé. A floated
7/16-in. diameter nylon pennant 300 ft long connected
this buoy to the surface instrumented buoy. Of the
twenty moorings placed, 7 or 8 survived the effects of
the event. One failed from collision with a vessel.
Eleven failures resulted from undetermined effects of
the detonation. The cause for ten of these was a tension
break at the lower end of the cable; the cause for the
eleventh could not be determined. The remaining mooring,
which had no instrument buoy attached and was marked
only by a spare subsurface buoy at the end of the nylon
pennant,
was never found. All but one cable failure was
within 8000
801.
KEYWORD(8S)
9003433
ft
of surface
zero.
However,
the survival of
two moorings at 4800 £t from surface zero indicates that
the wire size chosen, though marginal, would have been
satisfactory for open sea conditions alone. For the
combined sea and detonation conditions that did prevail,
an increase to 1/4 in. diameter cable for stations
within 8000 ft of surface zero probably would have been
sufficient to maintain all moorings. 4 references.
WAHOO BURST/instrumentation ;WIRES; INSTRUMENTATION;
HARDTACK; MOORINGS; ANCHORS; FAILURES; BUOYS
OFFICIAL USE ONLY