Introduction

Before deploying an ADCP, the instrument must be inspected, programmed, and tested.

The deployment frame, acoustic release system, batteries, sensors, and communication equipment should all be checked carefully before the instrument is placed on the seabed.

A proper setup ensures continuous and reliable data collection throughout the monitoring period.

Equipment Required

Before deployment, prepare the following equipment:

• Acoustic Doppler Current Profiler (ADCP)
• Bottom Mount Frame
• Acoustic Release System
• Recovery Float
• Mooring Rope
• Shackles and Swivels
• Internal Battery Pack
• Data Logger
• Configuration Software
• Laptop Computer
• GNSS Receiver
• Survey Vessel
• Hydraulic A-Frame or Crane

Step 1 – Inspect the Equipment

Inspect the ADCP body, acoustic transducers, pressure sensor, compass, battery pack, cables, connectors, and deployment frame.

Check that all components are clean, securely fitted, and free from damage.

Step 2 – Install the Batteries

Install fully charged batteries according to the manufacturer’s instructions.

Confirm that the expected battery life is sufficient for the planned deployment period.

Step 3 – Configure the ADCP

Connect the ADCP to a laptop using the manufacturer’s software.

Configure:

• Project Name
• Sampling Interval
• Measurement Cells
• Cell Size
• Deployment Time
• Recording Duration
• Wave Measurement Settings
• Compass Calibration
• Water Depth
• Time Zone

Review all settings carefully before saving them to the instrument.

Step 4 – Test the Instrument

Before deployment, perform a complete system test.

Confirm that:

• The compass is working correctly.
• The pressure sensor responds properly.
• The acoustic beams are operating normally.
• Memory is available.
• Battery status is normal.

Correct any issues before continuing.

Step 5 – Install the ADCP in the Bottom Frame

Secure the ADCP inside the seabed deployment frame.

Tighten all mounting brackets and locking bolts.

Ensure that the acoustic beams point upward toward the water surface for bottom-mounted deployments.

Step 6 – Connect the Acoustic Release System

If the project requires seabed recovery, connect the acoustic release between the deployment frame and the recovery line.

Test the release mechanism before deployment.

This allows the ADCP to be released remotely at the end of the project.

Step 7 – Deploy the ADCP

Navigate the survey vessel to the planned deployment location.

Use the hydraulic A-frame or crane to lower the ADCP slowly into the water.

Avoid sudden impacts while lowering the frame to the seabed.

Confirm the deployment position using the GNSS receiver.

Step 8 – Verify Deployment

After deployment, record:

• Deployment Time
• Water Depth
• GNSS Coordinates
• Instrument Serial Number
• Battery Status
• Project Name

These records are useful during data processing and recovery.

Step 9 – Monitor the Deployment

For long-term monitoring projects, inspect the instrument periodically if possible.

At the end of the deployment, use the acoustic release system to recover the ADCP safely.

Download the recorded data and inspect it before processing.

Common Mistakes to Avoid

• Deploying the ADCP on an uneven seabed.
• Forgetting to synchronize the instrument clock.
• Using low batteries.
• Incorrect compass calibration.
• Poor GNSS position recording.
• Deploying in areas with heavy vessel traffic without proper marking.

Best Practices

Always perform a full system test before deployment.

Calibrate the compass carefully.

Use corrosion-resistant hardware.

Record all deployment information.

Back up the downloaded data immediately after recovery.

Inspect and clean the ADCP before storing it.

Typical Deployment Duration

Depending on the project, an ADCP may remain on the seabed for:

• 15 Days
• 30 Days
• Several Months

The deployment duration depends on battery capacity, memory size, and project requirements.

Conclusion

A properly installed ADCP provides reliable measurements of ocean currents, waves, and water movement. Careful configuration, accurate deployment, and regular equipment checks help survey teams collect high-quality data for offshore engineering, dredging, hydrographic surveys, and environmental monitoring.