Line marker
Encyclopedia
In cave
(and occasionally wreck) diving, line markers are used for orientation. Directional markers (commonly arrows) point the way to an exit (although no permanent guideline must exist); non-directional markers ("cookies") are purely personal markers that mark specific spots, or the direction of one's own exit at line intersections / T's. One important reason to be adequately trained before cave diving is that incorrect marking can confuse and fatally endanger not only oneself, but also other divers.
The line arrow has been invented by Forrest Wilson at the Cave diving
NSS
workshop, inspired by Sheck Exley
and other cave diving pioneers, and later, few hundreds of the hand made were sold through Branford Dive Center in North Florida. Soon they became very popular and today are commonly used by underwater cave explorers.
Cave diving
Cave diving is a type of technical diving in which specialized equipment is used to enable the exploration of caves which are at least partially filled with water. In the United Kingdom it is an extension of the more common sport of caving, and in the United States an extension of the more common...
(and occasionally wreck) diving, line markers are used for orientation. Directional markers (commonly arrows) point the way to an exit (although no permanent guideline must exist); non-directional markers ("cookies") are purely personal markers that mark specific spots, or the direction of one's own exit at line intersections / T's. One important reason to be adequately trained before cave diving is that incorrect marking can confuse and fatally endanger not only oneself, but also other divers.
The line arrow has been invented by Forrest Wilson at the Cave diving
Cave diving
Cave diving is a type of technical diving in which specialized equipment is used to enable the exploration of caves which are at least partially filled with water. In the United Kingdom it is an extension of the more common sport of caving, and in the United States an extension of the more common...
NSS
National Speleological Society
The National Speleological Society is an organization formed in 1941 to advance the exploration, conservation, study, and understanding of caves in the United States. Originally located in Washington D.C., its current offices are in Huntsville, Alabama...
workshop, inspired by Sheck Exley
Sheck Exley
-Biography:Exley is widely regarded as one of the pioneers of cave diving, writing two major books on the subject: Basic Cave Diving: A Blueprint for Survival and Caverns Measureless to Man published by Cave Books, , and establishing many of the basic safety procedures used in cave and overhead...
and other cave diving pioneers, and later, few hundreds of the hand made were sold through Branford Dive Center in North Florida. Soon they became very popular and today are commonly used by underwater cave explorers.