In advance of Bonnie's arrival, four profile lines were surveyed by the CRAB. Line 62, located about 500 m north of the FRF's research pier is shown in the figure below. Although there was little change to the beachface, an inner sandbar formed at 190 m offshore, and the outer sandbar moved ~50 m seaward. The presence of the wide outer bar before the storm likely contributed to the stability of the beachface. The offshore movement of the outer bar caused deposition to occur to a depth of 5.8 m NGVD (National Geodetic Vertical Datum of 1929). The development of the inner bar and the offshore movement of the outer bar can also be seen in the video time exposures. Acoustic altimeters located near Line 62 at depths of 5.5, 8 and 13 m revealed bottom changes up to 20 cm during the peak of the storm, but negligible net change at -5.5 m and about -10 cm both at 8 and 13 m depth.