So if you ever, ever get an opportunity to take a dive in a submersible, say yes a thousand times, yes and please turn out the lights.

Sometimes pumps, such as beam pumps and electrical submersible pumps (ESPs), are used to bring the oil to the surface these are known as artificial lift mechanisms.

For maintenance or replacement, submersible pumps are raised by a chain off of the duckfoot and up the two guide rails to the maintenance (normally ground) level.

You don't see luminescence until the submersible begins to move forward through the water, but as it does, animals bumping into the screen are stimulated to bioluminesce.

When I'm sitting in a submersible though, I know that I'm not unobtrusive at all I've got bright lights and noisy thrusters any animal with any sense is going to be long gone.