Abstract: A self-supporting panel for a fence has a skewed anchor sleeve welded to each lower corner of the panel for receiving a stake to fasten the anchor sleeve to the ground or other support. Two panels are joined by a pin in the open ends of abutting lower rails from each panel and by a cap joining the upper ends of adjacent stiles from each panel.

Abstract: A plurality of elongated tanks positioned in parallel relationship with respect to each other are swingably interconnected at their aligned ends to provide a yieldingly undulating breakwater apparatus. The buoyancy of each of the tanks is individually adjustable so that the ratio of floating tanks to submerged tanks, and the various depths thereof, can be altered to suit the prevailing wave and current characteristics of a particular installation site.