18/34
communication and positioning devices
The 18/34, 18/34D and 18/34H are a family of universal devices for communication in reverberant shallow waters,
providing data transfer rates up to 13.9 kbit/s over a 3500 m range.
All versions are acoustically compatible with each other and differ in their depth ratings and beam patterns.
The applications include:
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Short- and mid-range operations in shallow waters
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High-speed communication and positioning for deep-water applications (18/34D)
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Data link and positioning for AUVs and ROVs
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Underwater acoustic sensor networks
18/34 models are available in the following product lines:
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S2C R - highly configurable standard build, optionally as OEM without housing (all versions)
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S2C M - light and compact build for popular tasks, optionally as OEM without housing (only 18/34)
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S2C T - ultra-light and compact build for space-critical tasks, optionally as OEM without housing
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S2C R USBL - highly configurable build with integrated USBL antenna for positioning, optionally as OEM without housing (all versions)
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S2C R WiSE - special edition with firmware sandbox for developers (only 18/34)
18/34
The 18/34 with a horizontally omnidirectional transducer beam pattern is a universal tool for communication in reverberant shallow waters. The beam pattern is optimal for horizontal transfers between mobile and/or stationary nodes.
Its compact transducer and great speed/range combination makes the standard 18/34 the most popular model for fast communication and positioning up to 2000 m deep.
18/34D
18/34D with a horizontally omnidirectional depth-rated transducer is a limited edition of 18/34.
18/34D is only available in titanium housing and is depth-rated for up to 6000 m, offering high-speed communication and positioning for deep-water applications.
18/34H
The 18/34H version offers the same speed and operating range as 18/34, but provides a wider-area coverage.
Its larger transducer with hemispherical beam pattern is optimal for horizontal, vertical and slant transfers between mobile/seafloor nodes and the surface.
TECHNICAL SPECIFICATIONS
General
| Operating Depth |
|
| Delrin housing |
200 m
|
| Aluminium Alloy housing |
2000 m
|
| Stainless Steel housing |
2000 m
|
| Titanium housing |
2000/6000 m (18/34D)
|
| Operating Range |
3500 m
|
| Frequency Band |
18 - 34 kHz
|
| Transducer Beam Pattern |
horizontally omnidirectional
hemispherical (18/34H)
|
Connection
| Acoustic Connection |
up to 13.9 kbit/s
|
| Bit Error Rate |
less than 10-¹⁰
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| Internal Data Buffer |
1 MB, configurable
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