124. Symbol number «3» shown in the illustration represents which of the following

Symbol 3 represents amidships, the mid-length reference position on a vessel, as indicated by the standard USCG symbol. Amidships is the longitudinal position halfway between the forward and aft perpendiculars. Displacement is represented by Δ, baseline by BL, and the forward perpendicular by an FP symbol, distinguishing them from the amidships double-circle mark.