Having thus shown the necessity for celerity, Nelson next discussed the plan of operations. Copenhagen is on the east side of the island of Zealand, fronting the coast of Sweden, from which it is separated by the passage called the Sound. On the west the island is divided from the other parts of Denmark by the Great Belt. The navigation of the latter being much the more difficult, the preparations of the Danes had been made on the side of the Sound, and chiefly about Copenhagen itself. For half a mile from the shore in front of the city, flats extend, and in the Sound itself, at a distance of little over a mile, is a long shoal called the Middle Ground. Between these two bodies of shallow water is a channel, called the King’s, through which a fleet of heavy ships could sail, and from whose northern end a deep pocket stretches toward Copenhagen, forming the harbor proper. The natural point of attack therefore appears to be at the north; and there the Danes had erected powerful works, rising on piles out of the shoal water off the harbor’s mouth and known as the Three-Crown Batteries. Nelson, however, pointed out that not only was this head of the line exceedingly strong, but that the wind that was fair to attack would be foul to return; therefore a disabled ship would have no escape but by passing through the King’s Channel. Doing so she would have to run the gantlet of a line of armed hulks, which the Danes had established as floating batteries along the inner edge of the channel—covering the front of Copenhagen—and would also be separated from her fleet. Nor was this difficulty, which may be called tactical, the only objection to a plan that he disparaged as “taking the bull by the horns.” He remarked that so long as the British fleet remained in the Sound, without entering the Baltic, the way was left open for both the Swedes and the Russians, if released by the ice, to make a junction with the Danes. Consequently, he advised that a sufficiently strong force of the lighter ships-of-theline should pass outside the Middle Ground, despite the difficulties of navigation, which were not insuperable, and come up in rear of the city. There they would interpose between the Danes and their allies, and be in position to assail the weaker part of the hostile order. He offered himself to lead this detachment.