U.S.S. NAUTILUS (SS-168) — war patrol report SS-168_NAUTILUS.pdf

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CONFIDENTIAL

U.S.S. NAUTILUS - Report of second War Patrol.
Period from August 6, 1942 to August 1942.
Area Makin Island. Operation Order No. 71-42.

9. Major Defects Noted.
(a) Trim manifold valve, pump discharge to sea failed. Valve
disc came off its stem. Repaired by ship.
(b) Spot air conditioning unit in after torpedo room failed.
Condenser developed leak, and system lost gas. Repaired
on board.
(c) Section of pipe in ship's refrigeration system failed.
Pipe was in salt water cooling system causing large leak
into the boat. Repaired on board.
(d) Silver soldered joint in after starboard power vent group
failed.
(e) Magnetic compass periscope fogged.
(f) After ammunition hoist failed. Worm wheel drive assembly
broke. Ammunition for top for servicing after gun was passed
by hand from forward hoist.
(g) Regulating governor #1 main engine could not be controlled
from control stand. Engine was operated by hand.

10. Radio Reception.
(a) Voice Radio.

The TBX voice transmitter and the RAS-1 receiver with pre-
selector were used aboard ship to communicate with the marines
ashore. The marines had portable radios of type BC-611-A. Great
difficulty was experienced in talking to the marines because of the
low signal strength of their BC-611-A sets and because the marine
sets were separated from the ship by a half mile of dense foliage
and woods plus two miles of water.

(b) Interference.

No many interference was experienced. However, gunnery spots
from shore spotters were frequently not received because of
high background noise caused by increase of sensitivity of the
shipboard RAS-1. Sensitivity was increased in an attempt to re-
ceive the very weak signal from the marines ashore. NPM on 4115
kcps was also heard when sensitivity was increased.

(c) The Underwater Loop Antenna.

The underwater loop antenna gave good daytime reception in the
Hawaiian area to a depth of sixty-five feet, but in the Makin area
we could get no reception during daylight when loop was submerged.
No night test submerged was made.

(d) Schedules.

Reception of Pearl schedules was good with the exception of,

ENCLOSURE (D)