The line level is hung on the line at the center of the line and the line is moved up and down at the second transit until the level reads as level. Another person is necessary to do this. When the line is level, its position at the second transit marks the elevation change. First, they may radiate from one point at an angle of from 5 to 15 degrees. Preferably, they may be measured parallel to each other, with starting points based on a straight line at intervals of 50 to 100 meters, depending upon the local topography.
Warm weather allows more of the latter, but boots and wet suits can be useful in colder weather.
In any case, note sea level when you reach it. A recorder should be taking down the data. Change of Elevation Cumulative Change in Elevation Distance Cumulative Distance Analysis Data may be entered into a spreadsheet with a graphing capability and allowed to graph the beach profile for you. Programs with a three-dimensional capability can take multiple profiles and create a picture of the beach face for you. Profiles may also be created manually on graph paper.