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Aboard today’s tactical military vehicles, seamless system integration is imperative, space is at a premium, and GPS is vulnerable to disruption by natural, friendly, and hostile jamming. Recognizing these needs, KVH offers the TACNAV II Fiber Optic Gyro (FOG) Navigation Engine, a FOG-based navigation and pointing solution. The affordable TACNAV II includes a compact design, continuous heading and pointing data output, and a flexible architecture that allows it to function as either a standalone navigation module or as the heart of an expanded, multifunctional TACNAV system.

KVH’s precision FOG technology and optional compass sensor provide extremely accurate dead reckoning navigation regardless of GPS availability. TACNAV II is designed to integrate with Battle Management Systems (BMS) such as FBCB2/BFT. TACNAV II’s reliable vehicle position and heading output contributes to situational awareness and is a vital component for effective battlefield management. It’s the perfect navigation and pointing solution for vehicle systems integrators and today’s digital military.

The TACNAV II is controlled by the Arms Export Control Act (Title 22, USC Sec 2751 et seq.) and the International Traffic in Arms Regulations, ITAR, 22 CFR 120-130, and may not be exported from the United States or disclosed to a foreign person in the United States except as authorized by those regulations.

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Brochures & Datasheets

Document File Info
BROCHURE - TACNAV Family PDF file 7 MB / 8 pg
BROCHURE - TACNAV Family - Arabic Arabic PDF file 3 MB / 5 pg
DATASHEET - TACNAV II PDF file 723 KB / 2 pg


Unfortunately, there is nothing that can correct for wheel slippage in the odometer feed as it relates to dead reckoning. However, TACNAV does compare its calculated distance against the distance traveled according to GPS. If there is a discrepancy between the two, TACNAV will temporarily adjust the odometer calibration factor to compensate for the difference.
Power lines have an insignificant effect on the TACNAV compass, unless you are next to a large substation with transformers. The lines themselves are typically too high to affect the compass. However, they may interfere with GPS reception.
No, TACNAV is a magnetic-based system and does not drift.
Yes. TACNAV systems have been used in combat and peacekeeping operations since the early 1990s.
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  • Precision KVH fiber optic gyro-based navigation to ensure 100% availability of navigation data regardless of GPS availability as well as automatic “drive and calibrate” capability
  • MTBF of 40,000 hours for outstanding reliability
  • Vehicle heading, steer-to, and dead reckoning outputs along with optional turret pointing and far target location for maximum versatility
  • Compact, lightweight design (8.8 lbs (4 kg)) for easy installation
  • Easy integration with BMS platforms via flexible, digital architecture, creating a standalone navigation engine for your BMS

Featured Options

  • Optional digital compass sensor antenna to provide long-term, drift-free heading reference backup, time-independent dead reckon backup, GPS-independent navigation, and instant-on northpointing
  • Optional TACNAV Universal Multilingual Displays for real-time navigation and heading data for commander and crew
  • Optional interfaces for turret angle encoders, laser warning receivers, laser rangefinders, and gunshot detection systems

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