ANVIL:
#01: Ship: Sea Tub Clarabella. Quest(s): "Illegal Cargo" & "Dunbarrow Cove".
#02: Ship: Black Flag. Quest(s): "Dunbarrow Cove".
#03: Ship: Serpents Wake. Quest(s): "The Ghost Ship of Anvil" & maybe, "Following a Lead".
The IMPERIAL CITY:
#04: Ship: The Bloated Float. Quest(s): "An Unexpected Voyage".
#05: Ship: Marie Elena. Quest(s): "A Watery Grave".
BRAVIL:
#06: Ship: Emma May. Quest(s): "The Forlorn Watchman".
Okay, those are the ones that I know about for sure. But I keep reading rumors of yet another cave with yet another shipwreck inside it. If that rumor is false and not true after all, then I guess I have a complete list here. If it is complete, I'd like to make a poll of it, asking members which ship and/or quest is their favorite one. How would I do that? Or does a Moderator do it for me? Advance thanks to the first one to answer that for me!
EDIT: (Attempt #02) Holy Smoke! There is another ship after all! It is the one I pondered about. I was overlooking Apple's NPC research as she read her Scroll of NPC Names. We saw a listing for, "Black Rock Pirate". Could it be?! Tired of waiting for the Grey Fox's messenger to arrive after a day or so of doing so, even though both Amusei and Methredhel have spoken to us more than once, we did a quick "COC BlackRockCaverns" and then used "TCL" to map as much as we could. We saw a few dogs that look like "Triumph the Insult Comic" and a mixed batch of living, not dead, bandits. We were northeast of Chorrol in Black Rock Caverns, hidden behind a waterfall. In that area, outside, be sure to get all the Nirnroots and other plants, as well as 2 treasure chests. Anyway, we teleported home to resume our wait. Then we saved and quit. Then I went to "UESP Wiki" and looked it up, and sure enough, according to them, there is a ship and ghostly crew! So I am editing this. I thought I'd found it before, a long time ago. But as it is so much like "Dunbarrow Cove", my memories of both must have blended them together. So here I am, editing this. But how do I edit the actual Poll section now?
CHORROL:
#07: Ship: Black Rock. Quest(s): "Black Rock Caverns"? A Non-Journal Quest.