Just as the US Navy is greatly interested in UUV research for facing off against China's growing Anti-Access/Area Denial capabilities, in turn, Chinese UUVs will bolster these capabilities. Antisubmarine warfare (ASW) has long been a US edge, so PLAN advancement in this area is of great significance. In ASW roles, underwater gliders offer a number of potential advantages. Traditionally, area detection for ASW aircraft was done with sonobouys, small, sonar equipped buoys airdropped over an area of water. Underwater gliders have better endurance than sonobuoys, whose lifespan are often measured in just hours. The larger size of underwater gliders (the Haiyan is four times as large as the USN's 16kg AN/SSQ-62E sonobuoy) also means that they can carry multiple sensor types to monitor changes in water temperature, conductivity, optical backscatter and acoustics. In the battle for detection of a stealthy submarine, using multiple sensor types increases the probability of finding the prey. Being self-propelled, UUVs can, in turn, cover a wider area. And unlike fixed underwater sonar stations, underwater gliders can be rapidly deployed via ships or airdrops to new uncovered areas (such as the Taiwan Straits or South China Sea), where their mobility complicates enemy efforts to disrupt and destroy them.