The X20 Mod is intended to bring the design philosophy of the Vampire tabletop RPG's 20th Anniversary Editions to Bloodlines: to make it feel like it fits into the wider World of Darkness setting by including references both overt and subtle, obvious and deep-dive, referencing material that came out before Bloodlines and after. One of Clan Quest Mod's recommended mods!
You may stumble across this discussion between cops on the Dane. The graffiti they're talking about isn't present in-world, but it sure sounds a lot like the symbol of the Followers of Set, who would have a strong presence in the ship's origin point of Turkey.