Kirkwall, UK; August 2, 2017;

built 1944 for Kriegsmarine as KFK 631 by Burmester, Swinemuende, Germany
(yard no. 388) No. V5537;
May 1945: surrended and later transferred to German Mine
Sweeping Administration (GMSA);

During WW II, a total of 1,072 of these Kriegsfishkutter (KFK) vessels were ordered;
610 were commissioned; during operations 199 were lost;
10 of these vessels were re-commissioned into the Bundesmarine as W1 to W10 (Jul 1956);
and with West German Border Guard (Mar 1957)
the remaining KFK vessels were transferred on war reparations;
147 to USSR; 156 to US and 52 to UK;

https://en.wikipedia.org/wiki/German_Mine_Sweeping_Administration

ex Hamburg, Germany-registered beam trawler HF-410;
(then owned-operated by Karl Simonsen, Hamburg; call sign: DIIC);
currently operated as dive charter vessel;
operated by Stonehaven Snorkellers;

L x B x D: 24 x 6.4 x 2.75 m;
MMSI: 235084524; call sign: MZLQ5