Nov 12, 2023
triatic stay, trough of the sea
verso Plate I and portion of margin across gutter, facing (and showing some variety of offset from) Plate II (Signal Flags and Lights, Repeaters, etc), 90º cw, inv., 10-1.00-255 ex General Signal Book of the Navy of the United States of America (1876) Phillips Library, PEM copy/scan : link
note: The plates are identified as originating from the “Bureau of Navigation, 1883;” they were evidently added later to this book, hence the rough glueing / dramatic sea-land-sky scapes).
9649 Triangle, s. 9650 Triangular, ly. 9651 Triangulation. 9652 Triangulate, d, ing. 9653 Triatic stay. 9696 Trough of the sea. link
