It crops up in forums where people are describing what they used to make their substitute Mortalis Decking and anything with any deck-like texture, as it’s a pretty damn good representation of what will/would be used for Ship decking.
Seems to be a form of knitting base, if you're interested.Some forums in the US called it Granny Grating. Or just 'Mesh', or ''stuff I found down in the store''.
Finally a name for it. Thanks to this thread.
Now to make bases, larger empty spaces and more!