Case Study: Safe Zephyrus achieves a 2% increase in gangway connectivity with StormGeo Response Forecasting

Response Forecasting Increases Gangway Connectivity

Safe Zephyrus, a Prosafe semi‑submersible accommodation vessel supporting Aker BP in the North Sea, struggled to maintain safe gangway connectivity for personnel transfers in harsh and unpredictable weather. Decisions had historically relied on seamanship and strict thresholds (about ±7 m gangway stroke and ~90° heading range), which often led to conservative disconnections. To address this, Safe Zephyrus trialed StormGeo and Deep Sea Mooring’s Response Forecasting Service.

StormGeo’s meteorology and hydrodynamics forecasts combined with Deep Sea Mooring engineering predict relative flotel and gangway motion so the crew can optimize heading and loading while maintaining safety. During a two‑month pilot on Safe Zephyrus, the StormGeo/DSM service increased gangway connectivity by 2%, delivering measurable operational efficiency gains, cost savings given the vessel’s 450‑person capacity and hire rates, and improved planning for support vessel and logistics operations.