Safe navigation at sea depends on integrated bridge systems that continuously assess sensor consistency and operational reliability.
In this episode of HANSA.newscast, recorded at the Anschütz bridge test facility in Kiel, Janne Silden speaks with Volker Wenzel about system behavior under GNSS disturbance. Jamming and spoofing propagate differently through bridge architectures, yet both challenge real-time plausibility assessment. In constrained waterways such as the Suez Canal, where recurring GPS signal disturbances are operational reality, these dynamics are not theoretical. Bridge systems are therefore built to detect, rate and compensate for unreliable signals in real time.
A central focus is consistency within modern navigation systems. Rather than simply aggregating sensor inputs, integrated bridges continuously validate heading, position, update rates, timestamps, and plausibility thresholds. Volker explains the role of the Consistent Common Reference System (CCRS), the backbone logic that cross-checks data streams, detects implausible position shifts, rates sensor trustworthiness, and dynamically prioritizes reliable sources.
The discussion also examines why heading remains the backbone of navigation. Unlike satellite-based positioning, gyrocompass heading is independent of external signal manipulation and forms the reference layer upon which radar overlays, ECDIS integration, and track control functions depend. Modern navigation architecture therefore operates as a layered safety system combining independent sensors, validation algorithms, and operator judgment.
From a design perspective, the non-negotiable principles remain clear: redundancy, continuous validation, operational clarity, and safety as the overriding objective. Reliable navigation is engineered resilience: where sensor independence, software logic, and skilled seamanship intersect.
