Inchkeith, an island in the fairway of the Firth of Forth, 22 m.
But unremitting efforts have been made to maintain a sufficient fairway up to Hamburg.
The sweepers continued their labours night after night, gradually extending the fairway up which heavy craft could safely venture.
M., and has communication with the open sea by a fairway, a mile and a half wide, which never freezes, and with the tide gives access to the largest vessels.
Until 1894 the fairway up to Bremen had a minimum depth of little over 8 ft.; thereafter important works were undertaken, the minimum depth was made 18 ft., and the importance of Bremen as a port was greatly enhanced.