A recent trip to DisneyWorld in Florida and a
subsequent ride on a paddle wheeler reminded me of something I had long forgotten. Thought
some of you might be interested in how depth was measured in the "Ol days".
Actually lead lines are in use today, although sparingly. I still carry one onboard,
although it is a modern type.
Capt. Matt
Mark Twain came into the world as Samuel Clemens on November 30,
1835, in Florida, Missouri. His parents moved to Hannibal, Missouri while he was a
young'un, and he spent his youth experiencing the adventures that shaped his life and
colored his writings. At 24, he realized a boyhood dream when he was finally entrusted
with the powers and duties of a steamboat pilot on April 9, 1859 in St. Louis.
Twain loved the paddlewheel steamboat and he loved the river. As
a matter of fact, it was during his years on the river that he chose his pen name.
"Mark Twain" was a frequent call of the leadsman. It meant that the water was 2
fathoms (12 feet) deep and indicated safe water.
A leadline is used to determine water depth and the type of material which
makes up the bottom or riverbed. A 30-foot-long line is attached to a pipe filled
with lead, except for the bottom 2 inches. (Modern leadlines are simply a solid round
pipe-shaped piece of lead with a concave bottom) Material from the riverbed...mud, sand or
potentially hazardous rock...collects in the lower, hollow end of the pipe.
The line itself, in the "Ol days", was
probably made of manila, hemp or sisal, and had markings woven into the strands which
represented various depths. Today's lead lines generally have polyester strands and bright
colored plastic tags with actual numbers are woven into the strands.
The leadsman is the person who "heaves the
lead" and "sings the mark". In the days of Mark Twain, the mark meanings
were actually sung as the paddle boat cautiously made its way along the river in
potentially shallow water. |
