Bridge / Instrument Room Hardware
Onboard, the Navigation Sensor Hub (NSH) is the interface between the in-water acoustic instruments, sensors and the Navigation Computer which runs the Ranger 2 software application. In addition to accurately time-stamping incoming data from external devices such as gyro, VRU and GPS, the NSH also provides power and communications for vessel’s acoustic transceiver.
The Ranger 2 software application is easy and intuitive to use, requiring only basic operator training to become familiar with it. It includes an extensive array of tools to allow the user to assess the performance of the system, including real-time acoustic quality indicators, noise analysis and signal travel time displays.
Acoustic positioning operations can be remotely monitored on a vessel network using a serial connection from Ranger 2 to Sonardyne’s Viewpoint software application. Viewpoint supports .dwg format backgrounds, on-screen guidance, measurement tools, configurable vehicle outline shapes and offsets, waypoints and geodesy.
HPT is a high performance, vessel-mounted acoustic transceiver that enables transponders being tracked with Ranger 2 to be precisely positioned. A number of different array designs are available from full hemispherical coverage to directional designs for ultra deep water and high noise operating environments, in MF and LMF variants. To allow tracking of long layback targets at shallow angles, a tilt adaptor enables the transceiver to keep the target being tracked within the ideal operating envelope of its array.
HPT transceivers can also be used as modems for autonomous monitoring transponder setup and data retrieval as well as supporting Long BaseLine operations when using a Sonardyne Fusion system.
The deployment method of the HPT transceiver is critical to Ranger 2’s positioningperformance. It should ideally be rigidly mounted to the vessel well below the keelaway from any weather or vessel induced aeration.
Sonardyne’s hydraulic through-hull deployment systems are extremely rigid and ideal for permanent vessel installation, whether new-build or retro-fit. For short-term projects on vessels-of-opportunity, a high quality over-the-side deployment system is available that is practical to transport and install on a vessel whilst it is alongside.
Vessel Reference Sensors
All USBL systems need to remove the effects of vessel motion upon the transceiver. To do this they are interfaced to heading, pitch and roll motion sensors of a quality appropriate to the accuracy required for the operation and water depth. Ranger 2 supports a wide range of these sensor types including Sonardyne’s own Lodestar AHRS unit which, for optimum system performance, should be mounted close to the vessel’s HPT transceiver.
Sonardyne’s GyroUSBL instrument combines a HPT transceiver and Lodestar AHRS in the same housing. With the AHRS in fixed mechanical alignment to the HPT’s acoustic array, the requirement for a total system calibration to determine the alignment of the ship’s motion sensors to the transceiver is, in many situations, eliminated. This saves operational time and vessel costs.
6G® Subsea Transponders
Ranger 2 supports previous generation Sonardyne transponders, for example WSM, and many transponders from other manufacturers. However the maximum benefits of the system can only be realised when using exclusively 6G® transponders.
WSM 6+ and WMT are small, lightweight units perfectly suited for tracking mobile targets such as ROVs, towfish and AUVs. They feature a responder trigger for fast position updates and are depth rated up to 4,000 metres.
DPT 6 is designed for DP reference and large target tracking. The unit is fitted with a highly reliable acoustic release mechanism to enable it to be deployed on the seabed in a floatation collar and later recovered to the surface without ROV intervention.
Compatt 6 is Sonardyne’s most advanced USBL and LBL transponder. Its integrated communications and navigation technology allows it to be used as a position reference transponder for DP, a multi-purpose modem and autonomous data logger.