Reference numberMS/525/6/6/2/2
TitleLetter from A L Gwynne, Explosives Commander's Ofice, HMS Vernon, to [Bertram] Hopkinson
Date2 February 1915
DescriptionDescription of trials of creepng mine models floated on an ebb tide. The CH type 'has made several efforts to get out to sea' while the P type has remained where it was laid. Both types have been cleared to make sure they were not being impeded by obstructions. With a small pencil sketch.
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