The German navigation system manufacturer Raytheon Anschütz has supplied an advanced gyro compass system for two 25,000dwt polar class heavy transport vessels for operation north of 70° LAT.
The vessels, Audax and Pugnax, were built at Guangzhou Shipyard International (GSI) in China for Red Box Energy Services, a company specialised in high-value offshore and onshore energy services. Built in accordance with the demanding DNV NAUT-AW and highest ice class notations, the vessels use state-of-the-art Anschütz instrumentation that enable year round operation in the most challenging polar conditions – including temperatures below -40° C . The vessels have been deployed for module transportation for the Yamal LNG project in Russia.
Raytheon Anschütz supplies these high-tech vessels with a comprehensive and advanced dual gyro compass system complete with redundancy in distribution and well as a stearing gear control system. This includes the top-of-the-range NP 5500 fully adaptive autopilot for maximum precision in heading and track control steering.
The gyro system integrates two maintenance-free, strap-down gyro compasses, which use hemispherical resonator gyros (HRG) for measuring angular rates. The new technology offers superior lifetime performance and outruns the long-term stability of traditional fibre-optical gyros (FOGs).
Anschütz gyro compasses are well known for their accuracy and reliability even under harshest environmental conditions. The sensors will deliver highest levels of precision and operational safety to support the demanding mission profile of the new artic vessels. The system includes typical features of an Anschütz gyro systems such as the automatic speed- and latitude error correction, an individual speed error correction mode, an independent transmitting magnetic compass path, and quick settling.
The Audax is pictured sailing in ice.