The chart title block should The title itself tells what area the chart covers. Survey data appears below the title (in the figure, surveys were carried out in 1993 by US Navy). Sounding data is given in meters in this case. The chart’s scale and projection appear below the above data (in this case, mercator projection is applied, geodetic standard is WGS 84). The chart will give both vertical and horizontal datums and, if necessary, a datum conversion note. Source notes or diagrams will list the date of surveys and other charts used in compilation.