Follow-Sub / Follow Target: Dynamic Positioning Function for Tracking Moving Targets

The Follow-Sub or Follow Target function is an advanced feature often integrated into Dynamic Positioning (DP) systems, enabling a vessel to maintain a position relative to a moving target. This capability is commonly used in offshore operations where the vessel must follow an underwater vehicle, such as a Remotely Operated Vehicle (ROV) or other subsea equipment, with precision.

How Follow-Sub / Follow Target Works

• Target Tracking: The DP system continuously receives positional data from the moving target, typically transmitted via an acoustic positioning system or other tracking technology.
• Relative Positioning: The vessel’s DP system calculates the required adjustments to maintain a set distance and orientation relative to the target.
• Automatic Adjustments: Thrusters and propulsion systems are dynamically controlled to follow the target as it moves.

Applications of Follow-Sub / Follow Target

1. ROV Operations: Ensures the vessel remains positioned to support subsea inspections, repairs, or installations.
2. Diving Support: Tracks diving bells or diver movements to maintain safe proximity.
3. Subsea Construction: Provides precise positioning for vessels laying pipelines, cables, or other subsea structures.
4. Seismic Surveys: Follows survey equipment or instruments to maintain optimal data collection.

Advantages of Follow-Sub / Follow Target

• Enhanced Precision: Maintains accurate positioning relative to a moving target, even in dynamic environments.
• Reduced Manual Input: Automates adjustments, reducing workload on the DP operator.
• Improved Safety: Ensures the vessel avoids collisions with subsea equipment or other structures.

Challenges and Considerations

• Signal Reliability: Requires consistent and accurate communication with the target for effective tracking.
• Environmental Factors: Performance may be affected by strong currents, poor visibility, or acoustic interference.
• Operational Expertise: Operators must be trained to monitor and intervene if necessary during follow-target operations.

Lerus Training: Expertise in Advanced DP Operations

At Lerus Training, we provide comprehensive courses to help maritime professionals master advanced Dynamic Positioning functions, including Follow-Sub / Follow Target. Our training programs include:

• Practical exercises in tracking and maintaining position relative to moving subsea targets.
• Understanding the integration of tracking systems into DP operations.
• Real-world scenarios using advanced simulators to enhance confidence and competence.

With expert instructors and state-of-the-art facilities, Lerus Training ensures participants are prepared for the complexities of modern offshore operations.