Maybe to throw off the Chinese they are asking SFRX to keep quiet. Plus, that may be why they did not file for a patent.
Yeah, that must it.
In 2021, Northrop Grumman was awarded a Phase 2 contract to continue the Manta Ray program that began in 2020. As part of Phase 2, the two prime contractors, Northrop Grumman Systems Corporation and Martin Defense Group, would each develop unique full-scale demonstration vehicles.