The only meanings of oceanic that I am familiar with are
1/ “pertaining to a/the ocean”, either literally or figuratively
2/ “very big”.
In this ‘ere WP article it seems to be used in the sense “global”
When asked to describe themselves while viewing an awe-inspiring sight (such as a dinosaur skeleton), test subjects were more likely to describe themselves in oceanic terms (e.g. “I am an inhabitant of the planet Earth") as opposed to more specific terms (e.g. “I have blonde hair")
Does this sound like an ordinary English usage to you?
EDIT: shakes fist at ExpressionEngine