Steel vessels are made unsinkable with water-tight compartments, and officially marked with a plimsoll load line beneath which they must not be submerged.
"American Merchant Ships and Sailors"
Willis J. Abbot
Here are a few taken at random from Smiles's History of the Huguenots-Bosanquet, Casaubon, Chenevix Trench, Champion de Crespigny, Dalbiac, Delane, Dollond, Durand, Fonblanque, Gambier, Garrick, Layard, Lefanu, Lefroy, Ligonier, Luard, Martineau, Palairet, Perowne, plimsoll, Riou, Romilly-all respectable and many distinguished, even cricket being represented.
"The Romance of Names"
Ernest Weekley
First he carefully removed the dirt down to a kind of plimsoll load-line midway his neck; then he frothed the soap-suds into his red rectangular ears, which stood out like speaking trumpets; there he let it remain.
"The Lilac Sunbonnet"
S.R. Crockett