Well, your first post was about how some people like Arvid Nelson were letting their ideas about the level of nautical technology among the Picts, et al. affect their views about Thurain Age geography and I was trying to reverse that line of reasoning. My point was that, because of the geography, you wouldn't have to have highly advanced nauctical technology or sophisticated ocean-going vessels.
Very cool of you to do so, Jeff.

I was just trying to dissuade anyone else from posting about Thurian Age geography on THIS thread when the "Geography" thread is such an excellent (and languishing) venue.
Even if you don't buy the Atlantean super-continent idea (and I'm not sure I do either---just throwing it out there as a possibility), Howard is pretty clear in MotS that the seas around the Pictish Isles were filled with islands. We know now that Polynesians made incredibly long voyages, but I'm not sure how much knowledge REH would have had about that in those pre-Thor Heyerdahl days. It doesn't really matter a great deal though since they would have never really had to cross large stretches of open ocean.
I believe there was a book that Churchward and Spence both quoted/cited about the Pacific/Polynesians. As you say, it may be irrelevant.
As for what he says specifically, in MotS, he mentions that the Lemurians had "fleets of canoes" and that the Picts/Nameless Tribe "made boats" to sail to Atlantis. Not a lot to go on, but you get the overall impression that he's talking about low-tech, island hopping technology like outrigger canoes and catamarans like Al suggests.
Now later, in EoA you have a sea battle between Lemurian pirates and the Valusian mentioned. The Valusians, who should obviously be more advanced, have "galleys" and "merchant ships." Gor-Na the Atlantean "harried the Valusian coast." So in EoA, you get the impression (and an impression is all that it is) that the barbarian races have more sophisticated ships than just canoes and the like, though not as sophistcated as the Valusians.
When I get more time, I'll go through the other Kull stories and see what other nautical references he makes.
I am on record as doubting almost every word out of (BMM) Gonar's mouth. Not that he's always WRONG, just that he's rarely 100% right. He's serving up "lore" that dates back 100,000yrs, after all.
The Lemurians required "slaves" for their "galleys" (Lemurian "barbarism" is the topic of another thread). REH has Kull raiding the Lemurian Isles. Brule owned a "galley".
I'm thinking that Atlanteans sailed in "curraghs" of some sort (it fits right in with "wooden chains"). Lemurian "galleys" had some resemblance to Chinese junks and the Pictish galleys were catamarans constructed from antediluvian redwoods.