What does the term 'occasional' mean regarding turbulence...

The term 'occasional' in the context of turbulence typically refers to occurrences that happen less than one-third of the time. This definition implies that while turbulence may be present, it is not a constant or frequent event and can be expected to happen sporadically rather than consistently.

In aviation, understanding these terms helps pilots gauge the level of turbulence they might encounter. When pilots are flying in conditions described as 'occasional turbulence,' they can anticipate that, while there may be disturbances, they are not severe or frequent enough to be a constant concern compared to other descriptors of turbulence.