Some results of the spectral and angular dependences of the IOP at different depths are presented. The submerged device ASP-15 is designed for continuous monitoring of inherent optical properties (IOP) of the Baikal Lake water. It is placed in South Baikal near the Neutrino Telescope NT200+ and used for optical accompaniment of its work at 1200 m depth. The construction of the device, methods of the light field measurements and retrieval of the optical properties are described.
inherent optical properties, absorption, scattering, monitoring