8 
The harmonic representation of inequalities (Horn, 1960) is a method for calcu 
lating tides that is similar to the non-harmonic procedure; however, the inequali 
ties of high and low waters as regards time and level are calculated in a man 
ner similar to the harmonic procedure by the combination of periodic elements. 
Unfortunately, many marine scientists use ready-made programme modules of 
the harmonic procedure (e. g. Pawlowlcza et al., 2002) for compiling their tidal 
analyses and tidal syntheses, without knowing about the limitations connected 
with this method. Frequently, the use of synthesis programme modules creates 
also demand for “tide constants” from the German coastal gauging stations, 
even though the tidal conditions on site are by no means constant. Since 1966, 
the German Federal Maritime and Hydrographic Agency refrains from publish 
ing such “constants”. Hydrographic offices In other countries still continue to 
issue such Information, because often the local tide conditions are not as com 
plicated as they are at the German flat coasts.