Offshore Crew Transfer Wave Prediction for Safe Bow Motion Windows
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Solution Overview
Problem
The risk of sudden vessel bow motion relative to offshore structures during crew transfers due to sea waves poses a safety hazard, leading to potential delays in offshore operations.
Innovation Solution
A system and method utilizing a wave detection device, prediction system, and indicator to predict vessel bow motion below a threshold value within a predetermined time, ensuring safe transfers by indicating when it is safe to proceed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the skipper makes a conservative call to avoid sudden vessel bow motion, then safety is improved, but transfer time is lost and productivity decreases
Solution Approach 1:
The prediction system performs preliminary assessment of future vessel bow motion based on detected sea waves before the transfer actually occurs. This allows the skipper to make informed decisions in advance about whether conditions will be safe for transfer, rather than waiting conservatively or reacting to dangerous situations.
Solution Approach 2:
The system continuously detects sea waves and provides real-time prediction feedback about future vessel bow motion. This feedback loop enables dynamic decision-making, allowing transfers to proceed when predicted conditions are safe while avoiding transfers when dangerous motion is predicted, thus optimizing both safety and productivity.
2Reliability
If the skipper makes a conservative call to avoid sudden vessel bow motion, then safety is improved, but service delays occur
Solution Approach 1:
The prediction system enables preliminary assessment of transfer safety conditions by analyzing detected sea waves and predicting future vessel bow motion. This allows service operations to proceed without unnecessary delays when conditions will be safe, while still maintaining safety through predictive awareness of dangerous conditions.
3Reliability
If wave detection and prediction systems are implemented, then transfer safety is improved, but device complexity increases
Solution Approach 1:
The prediction system serves multiple functions: it detects sea waves, predicts future vessel bow motion, provides real-time safety assessment, and guides transfer decisions. This multi-functionality consolidates what could be multiple separate systems into one integrated solution, reducing overall complexity while improving safety.
Data Source
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AI summary
A method for the use in offshore crew transfer when transferring a person between a crew transfer vessel and a structure or vice versa where a prediction system for predicting vessel bow motion in response to sea waves detected by said wave detection device is used. An indicator is adapted to indicate a prediction of vessel bow motion below a first bow motion threshold value within a first predetermined time period based on said prediction system. The transfer of the person only takes place when said vessel bow motion is indicated to be below the first vessel bow motion threshold value within the first predetermined time period.