Underwater communication systems
Overview
Contemporary underwater communication systems allow information transmission involving either acoustic or optical techniques.
Optical systems normally are restricted to extremely short distances because of backscatter and absorption.
Acoustic systems are more versatile, and therefore widely used.
Both optical and acoustic systems suffer from shadow zones. In shallow water the use of acoustic techniques can be severely affected by the interference of multi-path propagation caused by reflection and refraction. The comparatively slow speed of acoustic propagation in water is a limiting factor in terms of transmission data rates.
EM wave propagation systems can complement or replace the present acoustic systems to provide safe two-way diver-to-diver communications.
Optical acoustic sound transmitters and receivers
Scuba Equipment Gear Packages
Underwater Swimming Dangers: Shallow Water Blackout
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