Underwater acoustic positioning system
Underwater Acoustic Positioning System is a method for locating equipment underwater. It is used in a variety of contexts where wireless communication or GPS navigation is not feasible.
Overview[edit | edit source]
An Underwater Acoustic Positioning System uses sound waves to determine the position of underwater objects. This is achieved by measuring the time it takes for a sound wave to travel from a transmitter to a receiver. The speed of sound in water is known, so the distance can be calculated from the time delay.
Types of Systems[edit | edit source]
There are several types of underwater acoustic positioning systems, including Long Baseline (LBL), Short Baseline (SBL), and Ultra Short Baseline (USBL) systems.
Long Baseline (LBL)[edit | edit source]
Long Baseline (LBL) systems use a network of transponders placed on the seafloor. The transponders communicate with a surface vessel or submersible, allowing for precise positioning.
Short Baseline (SBL)[edit | edit source]
Short Baseline (SBL) systems use a set of transducers located on a single vessel. The transducers emit and receive signals, and the system calculates the position based on the time delay of the received signals.
Ultra Short Baseline (USBL)[edit | edit source]
Ultra Short Baseline (USBL) systems are similar to SBL systems, but use a single transducer and multiple receivers. This allows for a more compact system, but with less precision than LBL or SBL systems.
Applications[edit | edit source]
Underwater acoustic positioning systems are used in a variety of applications, including underwater archaeology, marine biology, and offshore drilling. They are also used in the recovery of sunken objects, such as aircraft black boxes or shipwrecks.
See Also[edit | edit source]
References[edit | edit source]
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