Blockship

Definition and stakes

Portrait of Alfred Francis Blakeney Carpenter Alfred Francis Blakeney Carpenter,  The Blocking of Zeebrugge

“ Allowing six feet as the minimum depth required to float small naval craft, it will be seen that the upper portion of each blockship should reach to within six feet of high tide level, or, at least, nine feet above low tide level, when resting on the bottom. The height of the blockship's hull, therefore, would need to be equal to the depth of the sea at low tide level plus, at {49} least, nine feet. Now, the choice of vessel is naturally limited. In the midst of war it is unlikely that a navy would possess many craft, if any, which were not already in use for other purposes. ”
Source: Gutenberg

Portrait of Alfred Francis Blakeney Carpenter Alfred Francis Blakeney Carpenter,  The Blocking of Zeebrugge

“ Firstly, she must have the ability to proceed under her own steam to her destination. The task of towing a blockship into position in the face of enemy opposition is quite impracticable. Secondly, her draught of water must not be excessive, having due regard to the depth of {70} the channel. Next, she would require a certain degree of defensive power; it would be rather heartrending, after all one's efforts at taking a blockship to within a short distance of her destination, if any small enemy craft could approach without hindrance and sink the ship before her destination was actually reached. ”
Source: Gutenberg

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