Is the River Dessarin deep enough for Jarlaxle to pilot the Scarlet Marpenoth upriver from the Sea of Swords all the way to Yartar?

Now the question of REAL note!
Is the River Dessarin deep enough for Jarlaxle to pilot the Scarlet Marpenoth upriver from the Sea of Swords all the way to Yartar? pic.twitter.com/2ZPOH9qVru

— Jim Flory (@Inveterate_DM) February 12, 2021

1)
Only if it runs on the surface for most of the way. Otherwise, there’s a good chance of it running aground. When running on the surface, crew members can stand atop it with long wooden poles, for fending off from rocks and… 2)
…snags. (Note: by “running on the surface” I mean all but the top of the hull submerged.) If the crew knows the Dessarin well, from piloting ships (with draft) and not barges, they could run submerged almost all the way.#Realmslore

— Ed Greenwood (@TheEdVerse) February 12, 2021