I don't have the the fancy paid-for version of Drinax - only the freebie pdfs, but I guess that's the fuel dump that Krrsh knows about in 'Honour Among Thieves', right? If so, then yes it's a secret.
So the route is Clarke-Torpol-Borite/Marduk-Noricum-Fuel Dump-Palindrome? That's six jumps so...