SLOP...never found it necessary, and neither have the Captains that work for us, either.
Therefore, not done in our outfit....and, not likely to start anytime soon.
I believe that there are some small (you might call them unnecessary) things in aviation which are useful and increase safety.
The chances to die in the head on crash on an airway are very low, but I guess the relatives of 155 dead people from that GOL flight (including the crew, which decided that SLOP is unnecessary) will not appreciate it.
Sarcasm on.
Looking out the window...never found it necessary, and neither have the Captains that work for us, either.
Therefore, not done in our outfit....and, not likely to start anytime soon.
Sarcasm off.