I have had people argue with me till they are blue in the face about my opinnion about rinse buckets.
But over the last 15 years, I have seen many cameras, including one of my own flood because of placing them into a rinse bucket, BEFORE THE FIRST DIVE.
DO NOT, put your newly closed camera into a rinse bucket.
Why? you ask
Pressure assists with sealing o-rings into place within the camera. The rinse bucket is normally less than 2 feet deep and does not provide enough pressure to properly seal a slightly misplaced O-ring or a camera back with a non-captured o-ring.
What I have learned to do is, Right when you jump into the water with your camera, drop quickly to 10-15 feet holding your camera with the dome port downwards. This pressurizes the housing and if any water is leaking it you will see it in the port. If not, your set to go.
Once you return to the vessel, dip and clean your housing in the rinse bucket. Remove and place in a safe location. Multiple cameras in a rinse bucket get banged around during rough seas etc. Not really good for your glass ports or knobs.