The Gemara in Menachos 94b says:
רבי חנינא אמר כמין תיבה פרוצה ר' יוחנן אמר כמין ספינה רוקדת
Rabbi Ḥanina says: It was rectangular, with a wide base and two parallel walls with an open space between them, like a box that is open on two sides. Rabbi Yoḥanan says that the shewbread was like a rocking boat, i.e., a triangular-shaped boat with a narrow base from which two walls rise at angles. Since the boat does not have a wide base it rocks from side to side.
Tosafos seems to confirm that he knows exactly what kind of boat Rashi is referring to when he says ‘like our boats’.
רוצה לומר כעין ספינות שלנו
What type of boat is exactly being referred to here? There are certainly many boats and names for those boats, which one is this?