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4.
Inspect the O-ring for proper closure. A complete seal can be visually confirmed by the O-ring
around the complete circumference of the housing.
5.
Always take the first dive without your camera in the housing just to make sure there is no leakage
from damage to the housing. During the dive—especially at the beginning of descent—take special
care to look at the housing to make sure no bubbles are escaping from it and that no water is entering.
Generally, if there is a problem with the seal, you will discover it in the first seconds of the dive.