off the work at S', and for the vessels and boats of the defense controlled therefrom. The Germans are whilst carrying out their special duties. now experimenting with sunken batteries, The boat channel is rendered inaccessible containing six Whitehead uncontrollable by self-acting fixed mines… … few self-acting mines, would be prepared knowledge as regards the best mode of in readiness to further block the channel operating these subaqueous weapons has at its narrowest part, on the outer de- yet to be acquired, so I will not venture fenses being forced. to further discuss them. The main…
Engineering
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