Mobile Transponder: Enhancing Dynamic Positioning in Subsea Operations

A Mobile Transponder is an acoustic device typically mounted on a moving vehicle such as a Remotely Operated Vehicle (ROV), an Autonomous Underwater Vehicle (AUV), or other mobile subsea equipment. This device is primarily used for tracking the vehicle’s position and can integrate with Dynamic Positioning (DP) systems to support advanced functionalities like Target Follow or Follow-Sub.

How Mobile Transponders Work

1. Signal Emission: The mobile transponder emits acoustic signals, which are detected by hydrophones or transducers mounted on the vessel.
2. Two-Way Communication: The transponder receives interrogation signals from the vessel and responds with positional data.
3. Real-Time Tracking: The DP system calculates the vehicle’s position relative to the vessel using the received signals, ensuring precise positioning.

Applications of Mobile Transponders

1. ROV Tracking: Ensures the vessel remains correctly aligned with the ROV during underwater inspections or installations.
2. Target Follow: Enables the DP system to track and maintain position relative to a moving vehicle.
3. Diving Operations: Assists in tracking diving bells or diver locations to enhance safety and operational efficiency.
4. Subsea Construction: Provides real-time positioning for vehicles deploying or recovering subsea infrastructure.

Advantages of Mobile Transponders

• Enhanced Precision: Provides accurate real-time positioning of moving vehicles, critical for complex underwater tasks.
• Seamless Integration: Works with DP systems to automate vessel movements relative to the tracked vehicle.
• Versatility: Suitable for various subsea operations, from exploration to construction.

Challenges and Considerations

• Signal Interference: Acoustic signals may be affected by environmental noise, water salinity, or temperature gradients.
• Battery Life: Mobile transponders rely on onboard power, requiring regular monitoring and recharging.
• Deployment and Retrieval: Proper handling during deployment and retrieval is essential to avoid damage or misalignment.

Lerus Training: Expertise in Subsea Positioning Systems

At Lerus Training, we provide comprehensive training on Mobile Transponders and their integration with Dynamic Positioning systems. Our programs include:

• Understanding the principles and functionality of mobile transponders in DP operations.
• Practical exercises in tracking and following moving targets using advanced simulators.
• Troubleshooting techniques to address challenges like signal interference and device calibration.

With expert instructors and state-of-the-art facilities, Lerus Training ensures participants are equipped with the skills and knowledge to excel in modern offshore operations.