Jerlov Type IB has the values

    absorption      0.656268 0.0626235 0.0315236
    scattering      0.026415 0.0305028 0.0332241
    extinction      0.682683 0.0931263 0.0647477
    diffuseK        0.58     0.0612    0.03324
    reflectivity    0.0003   0.0152    0.04048

The physical units of the numbers in the first four lines are [1/meter]. The numbers for reflectivity are dimensionless fractions. This choice is suitable for the clear equitorial ocean waters in the world, but not as clear as type IA or I.