The general comment of the authors about the discussion of Akyilmaz (2010) is that it does not bring any novelty to the published paper by Sertel, Cigizoglu, and Sanli (2008). It mainly reflects the author's personal views and expectations on practical issues, usually based on speculations rather than scientific evidence. The Sertel, Cigizoglu, and Sanli (2008) paper is new and has a merit in that daily mean sea level is characterized comparatively with methods of artificial neural networks (ANNs), multiple linear regression (MLR), and least squares estimation. The results of the paper are interesting in that the available methods in the field are quantified relatively using one specific data set, and ANN methods and MLR show tremendous improvement in modeling over the classical approach least squares estimation. Furthermore, it is useful and necessary, because it satisfies the standards of a...

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