Yes, he has - twice, in fact! The first time, he was actually marooned by the captain of his ship. He survived for a few weeks thanks in part to his hardiness... but mostly, thanks to supplies that washed up on shore after his captain's ship got caught on a reef nearby. He was rescued when Osca's naval vessel came by and spotted the boat!

The second time, he and his friends from the eastern half of the world were sailing across the ocean when they got caught in a particularly fierce storm (The open seas of Vensalút are plagued with them) and washed up on a large, nameless island with an unnaturally deep lagoon in the centre. Curious, Abas brewed them all some water-breathing potions (after a LOT of trial and error with local and salvaged ingredients), and they dove inside to explore... until the water started pulling them forcefully down! One chaotic waterslide later, and they all splashed down into one of the Azure Hells, which are large seas in the underworld. They hitched a ride on a big, friendly sea-monster to some desolate town ruins, where they were given a big ol' lore overload by an old, wizened demon-sage.