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With systems deployed worldwide, the Gaps Series high-accuracy USBL acoustic positioning and communication systems have become a trusted solution for users across the globe. Renowned for its unparalleled horizontal tracking capabilities and exceptional performance from ultra-shallow waters to depths of 7,000 meters, the Gaps Series supports diverse applications, including diver tracking, work-class ROV surveys, AUV missions, and even the most demanding dynamic positioning operations.
Powering ultra-performance subsea positioning and communication
Unmatched positioning accuracy
The Gaps Series delivers unparalleled subsea positioning accuracy (≥ 0.06% CEP50) in diverse and challenging environments. Its unique design integrates a high-performance ultra-short baseline (USBL) with FOG-based and MEMS motion sensors in a single housing.
True horizontal tracking
Next-generation Gaps USBL:
Extended range, telemetry, new MMI
Our next-generation Gaps USBL offers new powerful capabilities, including low-frequency tracking up to 7,000 meters, enhanced acoustic telemetry, and a modern, user-friendly Man-Machine Interface (MMI). Unlock the full potential of your subsea operations with advanced performance and seamless integration.
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A versatile and easy-to-use system
True calibration-free systems
With built-in gyro and motion sensors, the Gaps M5 and M7 systems eliminate the need for external sensors or on-site calibration, offering true calibration-free operation and significant time savings in the field.
True calibration-free systems
One system for positioning and communication
The Gaps Series combines precise positioning and advanced acoustic telemetry for seamless communication, supporting message transmission to multiple UUVs, INS re-alignment, sensor data retrieval, LBL array calibration with Exail Canopus transponders, and AUV command and control.
One system for positioning and communication
Easy to deploy
The compact Gaps Series is simple to install and operate, with embedded motion sensors for immediate use. Quick to deploy from over-the-side poles, stingers, or confined spaces, their compact and lightweight design allows use on small vessels with minimal crew or on instrumented buoys.
Easy to deploy
Third-party friendly for easy integration
With an open architecture, the Gaps Series is compatible with iXblue and third-party transponders, ensuring easy integration into existing equipment. It interfaces effortlessly with most widely used navigation software, making Exail's USBL systems simple to integrate and use.
Third-party friendly for easy integration
User-friendly modern web MMI
The Gaps Series offers a user-friendly, modern web-based MMI, providing intuitive control and easy access to system functions. This streamlined interface simplifies setup and operation, improving efficiency and minimizing the learning curve.
User-friendly modern web MMI
A scalable range for every operational need
The Gaps Series provides a versatile suite of solutions designed to meet the diverse
demands of modern maritime operations. With three distinct models, the series
is tailored to deliver precision and reliability across a wide range of
applications:
- Flexible deployment: Temporary or permanent setups, integration with vessels, USVs, or static installations.
- Extended-range options:
Depths of up to 7,000 meters for demanding missions.
- Broad applications: Ideal for diver tracking, work-class ROV surveys, AUV missions, and dynamic positioning tasks.
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 Gaps M3
|  Gaps M5 |  Gaps M7 | |
|---|---|---|---|
Pre-calibrated
| No | Yes | Yes |
Operating range
| 995/7,000m* | 995/7,000m* | 4,000/7,000m* |
Absolute accuracy (% of slant range CEP50)
| 0.2% | 0.06% | |
Acoustic repeatability (% of slant range)
| 0,1% | 0.1% | 0.06 % |
Embedded motion sensor
| Octans Nano FOG-based AHRS | Phins FOG-based INS | |
Heading accuracy
| 0.15° secant lat (RMS) | 0.01° secant lat (RMS) | |
Dimensions (height x diameter)
| 465mm x 296mm | 520mm x 296mm | 638mm x 296mm |
Dimensions (height x diameter)
| Learn more | Learn more | Learn more |
