Line holder

A stainless steel line holder with a 20-metre line

A line holder is an H-shaped piece of wood, plastic or stainless steel used to wrap a small rope such as a line.

Usage

It is usually used in conjunction with a surface marker buoy or a delayed surface marker buoy by divers. In this case negative buoyancy is important in order to safely unwind the line underwater:

the scuba diver can drop the line holder and wait from a safe distance for the partial or complete unwinding;
a negative buoyancy line holder will greatly reduce the risk of losing it.

Underwater diving

Modes	Freediving Saturation diving Scuba diving Snorkeling Surface-supplied diving

Recreational specialities	Altitude diving Cave diving Deep diving Ice diving Mixed gas diving Muck diving Open-water diving Rebreather diving Sidemount diving Solo diving Technical diving Wreck diving Underwater sports

Equipment	Backplate and wing Breathing gas Buoyancy control device Burst disc Decompression equipment Distance line/dive reel Dive computer Dive light Diver down flag Diver propulsion vehicle Diver's pump Diving air compressor Diving bell Diving chamber Diving cylinder Diving equipment Diving helmet Diving regulator Diving shot Diving suit Diving weighting system Dry suit Fins Full face diving mask Integrated Diver Display Mask Lifting bag Line marker Mask Moon pool Pony bottle Rash vest Rebreather Scuba manifold Scuba set Snoopy loop Snorkel Snuba Surface marker buoy Testing and inspection of diving cylinders Towboard Vintage scuba Wetsuit

Applications	Clearance diver Commercial offshore diving Diver training Frogman Military diving units Police diving Professional diving Public safety diving Recreational diving Saturation diving Scientific diving Underwater archaeology Underwater photography Underwater videography

Hazards	Barotrauma Decompression sickness Deep water blackout Drowning Dysbaric osteonecrosis High-pressure nervous syndrome Human factors in diving safety Hypercapnia Hypothermia Isobaric counterdiffusion List of diving hazards and precautions List of signs and symptoms of diving disorders Nitrogen narcosis Oxygen toxicity Scuba diving fatalities Seasickness Shallow water blackout Silt out Task loading

Procedures	Ascending and descending (diving) Buddy breathing Buddy diving Controlled buoyant lift Controlled emergency swimming ascent Decompression (diving) Decompression practice Dive planning Diver communications Diver navigation Diver rescue Diver trim Dive log Drift diving Emergency ascent Night diving Penetration diving Pyle stop Recreational diver training diver certification Diamond Reef System Rule of thirds (diving) Scuba gas planning Scuba skills Solo diving Underwater search and recovery Underwater searches

History	History of decompression research and development Researchers in underwater diving Timeline of diving technology

Categories: Diving equipment Professional diving Recreational diving Underwater diving history Underwater diving procedures Underwater diving safety Commons Glossary Portal

This article is issued from Wikipedia - version of the 10/31/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.

Line holder

Usage

See also