Detritus - Grade B
Grade B for detritus is defined as:
‘Predominantly free from detritus except for some light scattering’.
Detritus - Grade C
Grade C for detritus is defined as:
‘Widespread distribution of detritus, with minor accumulations’.
Detritus - Grade D
Grade D for detritus is defined as:
‘Extensively covered with detritus with significant accumulations’.