well if there is a slab over you and you swim upwards, the ocean can be seen clearly. particles are still there but the blue color under the ocean that makes it harder to see is gone.
well if there is a slab over you and you swim upwards, the ocean can be seen clearly. particles are still there but the blue color under the ocean that makes it harder to see is gone.
A slab creates an air pocket which acts like diving goggles.