sentences:  The dredging of the channel has completed in 1866 and it was known as the Francis Channel.However, Heath did not give up on his original path, and by 1882 work had begun dredging a path according to Heath's original path and by 1883 the new channel was operational.As the new channel was cut, a light was required to replace the 40-year-old lightship "Rose", which was not suitable to be used at the exposed end of the new channel.