The expedition was to cross the seas during the afternoon and evening, stopping for a few minutes about twenty miles from its destination for the purpose of disembarking the surplus crews of the blockships. At about this time the first of the diversions, in the form of aerial attacks, were to commence, to be shortly followed by the opening of the long-range bombardments. Meanwhile the expedition, working to a prearranged time table, was to approach the coast.
At given intervals during the approach small craft were to be detached to carry out the duties of smoke screening, of diversionary attacks, of locating the destination, and of dealing with enemy vessels which might emerge from their harbours or which were already at sea.
Immediately following the long-range bombardment, the storming vessels, having located the Mole, were to proceed alongside the high outer wall and land their storming parties over it to attack the Mole batteries—this constituting the main diversion of the enterprise. A few minutes later, the submarines, having steamed into place beneath the railway viaduct, were to blow up the railway. Twenty minutes after the storming vessels were due to arrive alongside, the blockships were to pass round the end of the Mole and were to make their dash for the canal entrance, running the gantlet of the shore batteries, whilst the Mole attack was in full swing. On arriving in the canal the blockers were to turn and sink their ships across the navigable channel. Rescue craft were to follow the blockships for the purpose of rescuing the crews of the latter. Meanwhile, the various diversions, the smoke screening, and the work of the inshore supports, were to be continued sufficiently long to enhance the chances of the rescue. After an hour or so from the commencement of the attack on the Mole all forces were to withdraw.
The foregoing brief summary serves to indicate that at any given moment after the approach had once commenced there would be many different events taking place simultaneously.
For instance, early in the proceedings there would be a combined aerial attack and long-range bombardment whilst the main expedition, under cover of darkness, was silently approaching over the mine-fields, momentarily expectant of discovery by the enemy's patrol vessels.
Later—say, ten minutes after the storming vessels had arrived at the Mole—the storming parties from Vindictive, Iris, and Daffodil would be attacking the northeastern end of the Mole; Vindictive's howitzers would be bombarding the shore batteries; small craft would be bombing the central part of the Mole; submarines would be blowing up the railway viaduct; the submarine's crews would be pulling away for dear life; other small craft would be laying their smoke screens close off the enemy's batteries and attacking German vessels on the inner side of the Mole; the blockships would be nearing the Mole in preparation for their final dash; patrol vessels, in support, would be guarding the attackers from enemy craft; star shell and search-lights would be illuminating the darkness; the booming of heavy guns, the yapping of quick-firers, and the crashing of shell would provide a fitting accompaniment.
The enterprise was to be decidedly intensive. If all went well the defence should certainly be mystified and not a little worried by the time the blockships arrived in the picture.
Thus, and thus only, should we be following out the maxim of Stonewall Jackson, "Always mystify, mislead, and surprise the enemy."
The enterprise divides itself naturally into three main phases, namely, the Approach, the Attack, and the Retirement; as far as practicable Part II will describe each of these phases in turn, whilst dealing more or less separately with the work of each class of vessel.