Class notation for enhanced nautical safety, incorporating a grounding avoidance system (INS)
Purpose
Statistics show that groundings and collisions amount to almost 50% of all serious ship casualties and the majority of these incidents are categorised as being due to human error.
The main objective of the NAUT-AW notation is to avoid bridge system failures by addressing both technical and human-related issues, with a particular emphasis on tasks related to navigation in narrow and congested waters.
Benefits
The NAUT-AW notation sets a bridge standard intended to reduce the risk of failure in bridge operation whether the navigational watch is carried out by a single navigator or several persons acting as a bridge team.
Modern navigational equipment is becoming increasingly complex and DNV's NAUT-experts are for this reason called upon for verification of the integrated navigation system being installed on NAUT-AW ships.
A thorough documentation of the ship's maneuvering characteristics is to be provided.
Independent studies conclude that there is a significant reduction in the risk of collisions and groundings for ships that have DNV additional class notations for nautical safety.
Features
The notation regulates the factors affecting the safe performance of the bridge operation, e.g.; wheelhouse design, workstation arrangement, navigational equipment, human-machine interface, working environment, etc. to ensure a reliable bridge system in various modes of operation.
The notation also calls for a grounding avoidance system to improve navigational safety and reduce the workload in narrow waters. In addition, the ship has to undertake trials to provide broad documentation of its maneuvering characteristics.
Testimonials
"Since 1988, all new SeaTrans ships have been built according to DNV's nautical safety class. This has led to a substantial reduction in groundings and a considerable reduction of insurance premiums."
Knut Skaar, Director of Ship Management Department, SeaTrans.
Process
Approval of drawings and technical documentation
On board testing of equipment