Source: ADM 199/1783 Proceedings
of U-boat assessment committee. Attacks on U-boat by Bramble and Seagull
Précis of Attacks by Bramble
and Seagull
Date: 8.7.42
Time: 1620
Position: 67°
26’N, 41°23’ E
Depth of
Water: 23 fathoms
Weather
conditions: Wind – light, variable, Force 1. Sea – calm. Visibility – 1 to 1
½ miles closing down later to 2 cables.
NARRATIVE
HM Ships
BRAMBLE and SEAGULL were carrying out an A/S sweep off the entrance to
Archangel. The ships were in line abreast one mile apart steering 170° at 5
knots. At 1620, SEAGULL on the port beam of BRAMBLE, obtained a contact at a
range of 1,500 yards on the port bow. The echo had a closing inclination and
the bearing was reported to be drawing left and the contact was classified
as ‘submarine’. A series of attacks were then carried out by both ships.
Details are as follows:
No. of
attacks |
1st |
2nd |
3rd |
4th |
5th |
6th |
Time |
1629 |
1647 |
1710 |
1739 |
1825 |
1908 |
Ship |
SEAGULL |
BRAMBLE |
SEAGULL |
BRAMBLE |
SEAGULL |
BRAMBLE |
Inclination |
Closing |
Opening |
Closing |
NIL |
Opening |
Nil |
HH |
Nil |
Nil |
Nil |
Loud |
Nil |
Nil |
Movement of Target |
Slowly
left |
Slowly
left |
Left –
steady |
None |
Steady
– right |
Nil |
Range
of losing contact |
150
yards |
200
yards |
150
yards |
150-200 yards |
200
yards |
150-200 yards |
Time
to fire obtained by |
Recorder |
Recorder |
Recorder |
Recorder |
Recorder |
Recorder |
No. of
D/C’s |
5 |
5 |
1 |
1 |
5 |
1 |
Depth
settings |
100 &
200 ft |
100,
150 & 200 ft |
150 ft |
250 ft |
100 &
150 ft |
250 ft |
Remarks |
Oil |
Oil |
Oil &
Bubbles |
Oil |
Oil |
Oil &
Air Bubbles |
No. of
attacks |
7th |
8th |
9th |
10th |
11th |
Time |
1942 |
2017 |
0212/9 |
0235 |
0327 |
Ship |
BRAMBLE |
SEAGULL |
SEAGULL |
SEAGULL |
SEAGULL |
Inclination |
Nil |
Closing |
Opening |
Opening |
None |
HH |
Nil |
Nil |
HE and
whistle effect. Tapping noises. |
None |
None |
Movement of Target |
Nil |
Right |
Left/Right |
None |
None |
Range
of losing contact |
150 -
200 yards |
150
yards |
150
yards |
150yards |
150
yards |
Time
to fire obtained by |
Recorder |
Recorder |
Recorder |
Recorder |
Recorder |
No. of
D/C’s |
5 |
5 |
5 |
1 |
1 |
Depth
settings |
100,
150 & 200 ft |
100 &
150 ft |
100 &
150 ft |
250 ft |
250 ft |
Remarks |
Oil &
Air Bubbles |
Oil |
Oil &
Bubbles |
Steady
stream of oil |
Oil |
Varying
visibility sometimes down to two cables hampered the movements of ships when
hunting and attacking. The necessity for conserving depth charges
particularly as there were no reserve stocks in North Russia at that time,
was the reason for the small pattern that were used. Although no track chart
has been forwarded it is fairly clear that all these attacks were made on
the same contact as there appeared to be no difficulty in holding the
target, both ships being more or less continuously in contact. BRAMBLE was
required for other duties and left the area after the seventh attack,
seagull remaining in the vicinity.
A Dan
buoy was laid in the position of the contact at 2135 by SEAGULL. Thereafter
SEAGULL remained in contact without attacking during the night. Nothing was
heard until 0200 when, at a range of 600 yards, strong hydrophone effect,
tapping noises and whistle effect were heard. At this time the range started
to open and the target was again attacked as described above, the contact
being held until 0835/10, with no further movement or sound. At 0417/14, on
returning to the position, SEAGULL found the contact in the same place still
stationary and quiet.
SURFACE
EVIDENCE
Oil and
bubbles were seen coming to the surface in a steady stream, but there is no
record of a sample having been obtained or analysed nor is the probable type
of the oil mentioned in the reports of either ship.
Four loud
underwater explosions were also reported by SEAGULL at 1810 and two by
BRAMBLE at 1847. It is possible, however, that these were delayed depth
charge explosions in view of the fact that the depth of water is only 23
fathoms, and BRAMBLE had been dropping depth charges set to 250 feet and
SEAGULL set to 150 feet.
It has
been reported that a Russian minesweeping trawler met with an obstruction in
67° 27’ N, 41° 20’ E whilst sweeping on the 9th July.
ASDIC
EVIDENCE
Details
of the contact held have been described above. Recorder traces obtained
during the period of this attack have faded but a trace obtained of the
contact on the 10th July has been forwarded by SEAGULL. This is
clearly marked and has the general appearance of a submarine contact. If, in
fact, as stated in SEAGULL’s report, the target started to move at 0200/9 to
the tune of various noises, having remained stationary since the previous
attack at 2017/8, the possibility of this contact being a wreck would appear
to be ruled out.
C.O.’S
OPINION
SEAGULL:
Considered that the U-boat was sunk.
BRAMBLE:
It appears that the U-boat must have been so badly damaged in one of the
earlier attacks that she was not able either to surface or move away from
her position. The U-boat made little or no movement after the earlier
attacks which evidently crippled her.
S.O. 1st
Minesweeping Flotilla’s Opinion
The C in
C, White Sea Forces informed me that the Russians still intended to carry
out diving operations but that an opportunity had not yet occurred. The
Russians, however, must have carried out some form of investigation as he
also informed me that one end of the considered U-boat was lying 40 feet
from the bottom and he had no evidence of any wreck in that vicinity.
With
reference to RAD’s minute, all explosions from BRAMBLE and SEAGULL of depth
charges dropped were accounted for, and the explosions referred to were from
a different source.
SUBMARINE
TRACKING ROOM’S OPINION
There is
no tracking evidence of the presence of a U-boat.
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