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CHCNAV APACHE 4

Hydrographic and Bathymetric Surveys USV

The APACHE 4 USV is purpose-built for hydrological studies, making it a strong fit for Australia’s diverse waterways—from inland rivers and irrigation channels to coastal estuaries. It supports a range of ADCP and compact multibeam systems, delivering the accuracy and flexibility needed for detailed flow and discharge measurements.

Its shallow draft and stable hovering capability make it ideal for capturing water velocity data in challenging environments, including low-flow rivers and hard-to-access sites common across regional and remote Australia. Compact and easy to handle, it allows for simple transport by vehicle, quick launches, and efficient site management in the field.

With integrated GNSS and IMU technology, the APACHE 4 provides reliable positioning and heading, enhancing both ADCP performance and autopilot control—ensuring precise, dependable water flow analysis in Australian conditions.

Features

Configurable Platform

Available with a selection of different sensors.

GNSS+IMU

Accurate positioning and heading data.

Android OS

Android software for hydrological and bathymetric surveys.

Lightweight

13 kg for single-operator deployment.

Benefits

Perform high-quality flow and velocity measurements with stable GNSS positioning and automated navigation. Ideal for hydrologists conducting ADCP hydrographic cross-section flow measurements.

Maintain high accuracy under bridges with integrated GNSS and IMU sensors. The APACHE 4 provides precise position and attitude data, compensating for hull sway and eliminating data outliers during GNSS outages.

With its central access shaft design, the APACHE 4 supports ADCPs such as the CHCNAV RS Series, M9, RTDP 1200, RiverPro and RiverRay. It also accommodates the CHCNAV HQ compact multibeam echosounder, side-scan sonar and water quality probes for end-to-end surveys.

Verify ADCP bottom-tracking data using the built-in single-beam echosounder. It provides water depth profiles in conjunction with flow velocity measurements, significantly extending the ADCP's sounding range.

Navigate accurately along cross-sections with adaptive water flow technology. The hovering feature improves flow estimation accuracy by maintaining stability at observation points, even in turbulent conditions

Industry Use Cases

Flood Risk Assessment

Sediment Transport Studies

Port Current Analysis

River Discharge Measurement

Product Specifications

Performances

  • Speed max. : 6.5 m/s max
  • Payload capacity : Up to 40 kg
  • Draft : 8.6 cm (unladen)
  • Positioning : Full GNSS + IMU

Sensors

  • Camera: 360° video

Echosounder

  • Type : Single beam, 200 kHz
  • Range : 0.1 to 200 m
  • Accuracy : ±0.01 m + 0.1% x D

SIMAR Geospatial Pty. Ltd.

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