Cave Line Symbols
Cave arrows, Line arrows or Dorff markers (after Lewis Holtzendorff). These are plastic arrowhead markers which are hooked onto a cave line by wrapping the line around the arrow through the slots. They are used to indicate the direction to the exit, and can be identified by feel. The message is simple, but of critical importance, as if a diver does not know which way to go at a line junction there is a risk of serious trouble. Line arrows are used at a junction on the permanent line, so when the diver gets back to the tie-off, he or she can identify which way to turn.
Read more about this topic: Diver Communications
Famous quotes containing the words cave, line and/or symbols:
“Stands the Spring! heralded by its bright-clothed
Trumpeters, of bough and bush and branch;
Pale Winter draws away his white hands, loathed,
And creeps, a leper, to the cave of time.”
—Philip Larkin (1922–1986)
“The line of separation was very distinct, and the Indian immediately remarked, “I guess you and I go there,—I guess there’s room for my canoe there.” This was his common expression instead of saying “we.” He never addressed us by our names, though curious to know how they were spelled and what they meant, while we called him Polis. He had already guessed very accurately at our ages, and said that he was forty-eight.”
—Henry David Thoreau (1817–1862)
“There are those who would keep us slipping back into the darkness of division, into the snake pit of racial hatred, of racial antagonism and of support for symbols of the struggle to keep African-Americans in bondage.”
—Carol Moseley-Braun (b. 1947)