SamTgJ Ex15:5 :נעתו בצברן כדמות אבן‏ : they went down with ballasts like a stone
See the entire entry for ṣbrh n.f. ballast

SamTgJ Ex15:5 :תהומים כסונון‏ :
See the entire entry for thōm, thōmā n.m. abyss