Solstice MAS is a unique family of Multi-Aperture Sonars designed to provide AUVs and tow-fish systems with world-class imagery by blending the high performance of Synthetic Aperture Sonar with the reliability and robustness of conventional side-scan. Wavefront's Solstice MAS product line-up gains a new flagship model - Solstice MAS 4000 . With dramatically improved resolution and enhanced real-time autofocus, there has never been a better alternative to SAS for dependable, high-quality shallow water sonar imagery.