HAV meaning in Governmental ?

Hybrid Air Vehicles Limited is a British limited company and was a British manufacturer of hybrid airships, though none have been built since the crash of its last demonstrator. These aircraft use both aerodynamics and lighter-than-air (LTA) technology to generate lift, potentially allowing the vehicle to stay aloft for several weeks.

The company developed the HAV 3 technology demonstrator. This won it the US Army LEMV contract, in association with Northrop Grumman as the prime contractor, and led to the HAV 304. Following termination of the LEMV project, the HAV 304 was rebuilt as the Airlander 10. It was the largest aircraft flying at the time. The Airlander 10 was seriously damaged in one event in 2016 and then written off after another event at the mast in 2018. The company has stated that it will not be rebuilt.