Hello,
I've sailed on those Hellesponts, well, last year they were sold. They are 442,000dwt and 509,000t full load. I've posted some pictures of Ti Europe, which is the ex-Hellespont Tara.
There were 4 of them, all sold in August 2004. Now they sail under Tankers International.
I don't know why Hellespont sold all 4 of them at once.
It was reported that Hellespont had ordered a new 4,000,000 barrel ULCC (for comparison, the Ti/Hellespont ULCCs are 3.2 million barrels). So basically a new 510,000 dwt one would be possible if it's this ship? But I'm not sure where they ordered it.