Whatever it was, I knew that it was climbing aboard by the log-line.
He held up a coiled length of log-line as a visible corroboration to his statement.
"Heaving the log," to ascertain the speed by means of a log-line.
Sillometer, si-lom′e-tėr, n. an instrument for measuring the speed of a ship without a log-line.
As to what's called longitude, she's best left to the log-line.'