Started new career in August 2019 to commemorate the beginning of WWII, 80 years before ...
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U 115
- KTB -
First War Patrol
(17th war patrol overall)
Sunday,
4 July 1943 - South of Madagascar -
0008 - ESE7/6, overcast, light haze, medium visibility, ~1000mb -
0700 - Qu.5856JA - Diving for torpedo maintenance and trial dive.
0705 - T=50. Beginning torpedo maintenance.
0758 - Tube V serviced (EtoFat/Pi39H). - Break until 0813 -
0905 - Tube VI serviced (EtoFat/Pi39H).
0910 - Beginning of Trial Dive acc.
B.d.U. Standing Orders No.507 and No.308. 145rpm.
0948 - Boat is safe and secure at 2A-Meter.
0950 - Setting for T=20 with 96rpm.
1006 - Reception Depth.
Battery 82.9%, Compressed Air Supply 300Atü(!), CO₂ 1.5%.
Cmdr.:
The L.I. reports that the malfunction of the Pressurized Air Gauge might stem from the Compressor itself. The investigation is ongoing.
1009 - S-Tiefe.
1010 - Qu.5864JA - Surfaced from S-Tiefe after 3h 10' and 9.0nm. Weather and Sea unchanged in 10h.
1017 - Boat ventilated. 2x235rpm/7-8kn.
1108 - Morning Dawn.
1200 - Qu.5866JA - Days Run: 172.8nm - ↗ 163.8nm (20h 50') -↘ 9.0nm (3h 10')
Total: 10821.9nm (60tg 22h) - ↗ 10399.1nm (54tg 07h 05') - ↘ 422.8nm (6tg 14h 55')
Course 87°; 436cbm (1cbm in 24h); Battery 82.9%; 2xEtoFat; 8xBold.
ESE7/6, overcast, light haze, medium visibility, ~1000mb (Weather & Sea unchanged in 12h)
1209 - Sunrise.
2143 - Sundown. Weather and Sea unchanged in 22h.
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Appendix to Communications Instructions
Operations Order "Monsoon"
Draft
Standing War Order B. d. U. No. . . . . . . . . . . . .
- Communications Directions -
U-boat Wireless system India.
I.
General:
1.
Purpose:
The Indian wireless system is intended for wireless traffic between the Command and U-boat operating in the Indian Ocean.
2.
Beginning and termination of the system:
This will be ordered by the Command in a wireless message. (In exceptional circumstances by a sailing or operational order.)
3.
Set-up of the system:
a) The Indian system consists of 2 short waves and one very long wave. The same messages with the same serial number will be sent on both short and very long wave.
b) The two parallel short waves will ensure favorable reception and transmission conditions for boats in all areas covered by this system.
c) According to Order 200 paragraph 15, a special short wave transmission can be operated at program times as supplement to the very long wave program times. Boats operating on the Indian system may only use this short wave for the transmission of reports by special permission.
d) The Indian system short waves occasionally available may be used as a transmission frequency by all boats at sea.
II.
Waves and Traffic times.
4.
Shortwaves:
a)
India A
Control . . . . . . . . . W/T name . . . . . . . . Checking reception . . . . . . . . .
from . . . . to . . . . wave . . . . = . . . K/cs
RST
KorvKpt.& Cmdr. U 115