Six lines approximately normal to the axis of McMurdo Sound were set out with flags on wooden beacons at 2 1/2 km spacing to facilitate surveys across the sound (Fig. 10). Ice breakout prevented those lines north of the Strand Moraines from extending more than 16 km east from the Victoria Land coast. It was intended to make extensive piston coring, bottom photography, bathymetric and gravity surveys. However, electronic problems with the triggering of the camera prevented any underwater photography and the piston coring was only partially successful.