Figure 25. Detailed planar view of the transverse sand waves east of Great Ledge from the digital terrain model produced during National Oceanic and Atmospheric Administration survey H11077. Blue arrows show direction of net transport interpreted from sand-wave asymmetry. Note that scour around boulders forms comet marks and that boulders protrude through the sand and also the sharp transition to megaripples along the northern edge of the field. Location of view is shown in figure 19.