Note 90 — VI THE RISING OF NEW ENGLAND

It is estimated, from careful calculations, that to put out of action a searchlight at night with shipfire at a range of 6,000 yards, more than a thousand shots from 3-inch guns should be required. The fact is mentioned here to illustrate the great strength of harbor defenses against fire from the sea, if there be enough mobile troops on the land to prohibit destruction by landing parties.