The DP-D300A Doppler Velocity Log (DVL) is a deep-water underwater navigation instrument designed for high-precision velocity measurement and seabed tracking. Based on the acoustic Doppler principle, the system measures three-axis velocity relative to the seabed or water column while simultaneously providing real-time altitude data between the transducer array and the seabed.

Operating at a 120 kHz center frequency, the DP-D300A supports long-range bottom tracking up to 300 meters and is designed for reliable operation in demanding subsea environments. The system automatically switches between bottom-tracking and water-tracking modes, ensuring continuous velocity data in complex underwater conditions.

The DP-D300A can operate independently or integrate with Inertial Navigation Systems (INS) to provide accurate motion reference data for underwater vehicles and marine survey platforms.

Key Features

• 120 kHz acoustic Doppler velocity measurement technology
• Automatic bottom-tracking and water-tracking mode switching
• Three-axis real-time velocity output (X, Y, Z)
• Seabed altitude measurement for underwater navigation
• Maximum bottom tracking range up to 300 m
• Internal data logging with ≥312 hours storage capacity
• RS422 communication interface with PD6 protocol compatibility
• Built-in system self-diagnostics and data validity evaluation

Advantages

• Reliable velocity measurement accuracy better than 3‰ ± 3 mm/s
• Stable velocity output for underwater navigation and motion control
• Automatic data validity detection improving operational reliability
• Flexible integration with INS and marine control systems
• Compact subsea-grade structure suitable for underwater vehicles and platforms

Functions

• Real-time three-axis underwater velocity measurement
• Altitude measurement between transducer array and seabed
• Automatic switching between bottom-tracking and water-tracking modes
• Internal mission data recording and storage
• Self-diagnostic system status monitoring
• Navigation data transmission via RS422 interface

Applications

The DP-D300A Doppler Velocity Log is designed for underwater navigation, motion sensing, and positioning in a wide range of marine and subsea operations, including:

• Autonomous Underwater Vehicles (AUV) navigation
• Remotely Operated Vehicles (ROV) positioning and control
• Unmanned marine robotics platforms
• Marine hydrographic survey systems
• Oceanographic research equipment
• Seabed mapping and underwater inspection missions
• Offshore engineering and subsea exploration operations