The PHINS COMPACT C3 is a state-of-the-art naval inertial navigation system (INS), designed to meet the demands of the navy for high performance INS, and enables stealth autonomous navigation for surface or subsea applications, providing very accurate heading, roll, pitch, speed and position. These products also uniquely address the navigation needs of advanced naval surface vessels, operating in severe GNSS-denied environments or sparse USBL or LBL positioning.

The PHINS COMPACT C3 is based on iXBlue fiber-optic gyroscope (FOG) technology, which has demonstrated superior reliability and navigation performance over many years and thousands of units.

The RD Instruments Explorer DVL is a small, low power consuming DVL designed especially for small platforms operating in the littoral zone. Typically, the 600kHz DVL will be used, for maximum accuracy (other frequency options are available). The board design of the DVL allows it to be tightly mechanically coupled with the Inertial Navigation System (INS) in a compact package that is mounted in one Gavia module.

In the DVL the water current is calculated as the difference between the measured bottom track velocity and the measured water velocity rotated into an Earth-fixed reference frame using the vehicle’s best orientation estimate. The water current is logged on a solid-state flash disk in the Control and Communication Module for post-mission analysis.

Using the altimetry provided by the DVL, the Gavia Depth Pilot can maintain a set altitude above the bottom for the purpose of performing side-scan or photographic surveys. While tracking the bottom the vehicle observes the operating constraints of the minimum and maximum depth specified in the mission plan. The Gavia will not descend beyond the specified maximum depth, but rather continue at this depth until the bottom rises above this depth. If the vehicle is unable to stay within the specified minimum depth while maintaining constant altitude, the vehicle will proceed onto the next leg of its pre-defined survey pattern.

Specifications

• Weight / Displacement: Dependent on which option is selected 
• File Format Vendor proprietary, exportable to .csv file format
• Removable Yes, hard coupled and calibrated to DVL/ADCP
• Data Storage Main PC
• Accuracy Dependent on which option is selected
• Synchronization The INS data is time stamped by its own internal clock that is synchronized to the GPS PPS output​
  
  

Applications

• Navigation for all applications​