I heard there was something fishy going on in First Class.

Hint 1 of 22:

Yes, there is.

Hint 2 of 22:

It's so fishy, it might even make the evening news.

Hint 3 of 22:

Try turning on one of the TV's on board and flip through the channels.

Hint 4 of 22:

Channel 4 is showing a room chevron.  Why don't you try to figure out where
that room is located?

Hint 5 of 22:

You'll need to manually edit the chevron displaying in your PET by holding
SHIFT and clicking on the pieces of the chevron until it matches what you see
on the screen.

Hint 6 of 22:

And in case you didn't notice, the chevron is displayed upside-down on the TV
screen.