The RIEGL VQ-840-G is a compact topo-bathymetric airborne laser scanner especially suited for coastline and shallow water mapping providing more than 2 Secchi depths water penetration.
Optionally complemented by an integrated IMU/GNSS system and a camera or an IR rangefinder, the system is ready for integration in various aircraft platforms including UAVs.
Riegl has released a new video highlighting this system and its capabilities on their YouTube channel.