There have been a number of UAV developments undertaken outside the DOD that have either application and/or significance for naval operations. For example, NASA development of the solar-powered helicopters could have future application as an extreme-endurance ISR platform. Even though these systems are relatively fragile technology demonstrators, with further development, operationally useful concepts might be possible. The NASA Altair (similar to Predator B) might also have application. Similarly, the privately developed Insitu Aerosonde global range mini-UAV and the commercially available Yamaha Rmax helicopter could also have naval applications.