TNA ADM 334 83

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COMMANDING OFFICER? H.M.S. "SEVRA".
TO.
F.O.I.C., FALMOUTH.
November 12th. 1940.
Sir,
I have the honour to submit that, having been ordered to sea
at 0730/6 November to carry out the routine search of Q.Z.S.180 to the
20 fathom line, I proceeded to sea at that hour and, having streamed
sweep, commenced operations at the West Narrows Buoy, steering through
the boom gate and keeping close to St. Anthony Lighthouse in order to
search for a mine reported to have been dropped in that area.
After passing two cables to the eastward of the first dan-buoy
marking the centre of the swept channel, course was altered 20° to
port onto South magnetic to search the eastern edge of the channel.
Very shortly afterwards, at 0832 approx., a mine was detonated in the
end of the sweep to port (red polarity being rigged to port). Two
photographs were secured of this explosion which was of the size and
nature of a small magnetic mine detonated in 4-5 fms. It was not obse
erved whether this explosion occured during a pulse. Position of mine
was reported to St. Ant опужи as being 190° 5 cables from the Lightho-
use. The D.G. circuit and Pulsing gear continued to function normally.
I then continued my search of Q.Z.S. 180, making two laps of
either polarity to eastward of the dan-buoys and fixing by sextant
angles on two successive occasions the positions of the second and
third danbuoys to seaward - - the former appearing to be to eastward of
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