The data on evaporation of a two-layer particle with solution-type cover having sea aerosol parameters have been obtained using the numerical solution of a shortened set of equations of heat and salt balance, particle evaporation and growth of solid nucleus. Using the approximation of homogeneous particles with effective refractive n and absorption i indices the main energy characteristics of sea aerosol in the visible (l= 0.63 m) and IR (l = 10.6mm) spectral regions have been calculated. The above results are compared with the analogous data for a homogeneous water drop. Recommendations are given for calculating laser radiation intensity, being propagated under conditions of background sea aerosol (aЈ1mm) based on the obtained data on radiation attenuation coefficients for the wavelengths considered.