PMA Wants to Eliminate Hoot Shift?

Just saw this in this morning's Breeze. So for those of us who aren't either ILWU or work in the port in other capacities, could someone give some clarity on the role of the Hoot Shift, any kind of perspective on a switch to two 10 hour shifts, etc... The only thing I know is that I have friends who do 10 hour shifts and they love them, since they get more days off, but I don't know how applicable that situation is here.

The PMA PR folks say this is about efficiency, not about the overpayment of folks for what's basically a half-shift, but that's a little (or a lot) too convenient for my taste.