Get Ready to Move Up to the Next Generation Laseref VI

Honeywell’s long record of inertial reference system (IRS) innovation continues with the Laseref VI Micro IRS, which is ready today to deliver next-generation performance for operators flying Bombardier Challenger 605 and Gulfstream G450/G550 aircraft. We expect Laseref VI to be available for other business jet models in the future. 

The evolution from the previous generation Laseref V IRS began at the end of 2023,. That is when part obsolescence and high repair costs caused us to discontinue coverage of the Laseref V inertial reference unit (IRU) Part Number HG2100AB07 under the Honeywell MSP-Avionics Systems maintenance service plan.

We encourage Challenger 605 and Gulfstream G450/G550 operators to upgrade to Laseref VI IRU Part Number HG2100BB05, which has been developed as a replacement for the HG2100AB07. If you have the new part number already installed, it can be covered under MSP-Avionics Systems at no additional cost. 

Plans call for other Laseref V applications to undergo a similar transition to the more advanced Laseref VI system soon. Watch for more information on the timetable for this upgrade.  

Contact your Honeywell representative or email us for more information on the Laseref VI upgrade and potential discounts and exchange allowances for acting promptly.

Meet the Future of Inertial Navigation  

Compared to earlier versions of the Laseref V, Laseref VI delivers better performance in a smaller and lighter package that consumes less power than the previous INS. The Laseref VI is a drop-in replacement for the Laseref V, so no aircraft downtime is needed to make the upgrade. 

With Laseref VI, you will have access to regular software updates to ensure currency and maximize performance. It also integrates seamlessly with other avionics systems, such as heads-up displays (HUD) and synthetic vision systems (SVS) and supports advanced navigation systems like required navigation performance (RNP). 

LASEREF VI is accurate to within 95% over long distances, is highly reliable even during GPS interruptions and is three times more resistant to spoofing attempts.

Honeywell has fielded more than 20,000 Laseref VI units since 2023, which have flown more than 200 million flight hours on 30-plus aircraft models. 

For more than four decades, Honeywell LASEREF systems have been known for high accuracy and reliability, and LASEREF VI continues that tradition. Like previous-generation Honeywell INS systems, LASEREF VI uses advanced ring laser gyroscopes (RLGs) and accelerometers to measure an aircraft's motion and orientation without relying on external signals like GPS.