In a recent paper, Tezkan & Yaramanci (1993; hereafter referred to as T&Y) present observations of sea-surface and ice-shelf surface-elevation variations from the Ekstrom Ice Shelf, Antarctica. The sea-surface observations come from a pressure sensor moored in the open ocean about 10 km from the ice front and it is assumed that these data closely resemble the vertical tidal motion of the ice front itself. The ice-shelf surface observations were obtained using a gravimeter at Georg von Neumayer station (GvN), situated about 10 km inland from the ice front. The quality of both data sets is very good and the analyses for tidal constituents and for the different components of the gravity reduction are rigorous and detailed. However, we disagree with a short section near the end of the paper where T&Y interpret the GvN observations using a simple cantilever, elasticbeam model for the ice shelf, in which one end of the beam is fixed (the hinge line), leaving the remainder to be influenced by tidal forcing. This problem was first studied by Robin (1958). T&Y have assumed that the whole beam is subjected to a uniformly distributed load due to the ice-shelf mass, but the supporting force of the underlying water is not included. Our doubts arise from this fundamental omission, as the physics on which the model is based is inadequate. Their conclusion regarding the position of the hinge line on Ekstrom Ice Shelf is based on this model and is, therefore, incorrect. T&Y place the hinge line about 55 km south of GvN (T&Y Fig. 2) which implies that, south of this line, tides will have no effect on the motion of the ice shelf. This line is up to 50 km north of the grounding line (the point at which the ice flowing off the land begins to float) identified from Landsat imagery. All the evidence from other ice shelves show tidal motion right up to the grounding line. It is highly unlikely that Ekstrom Ice Shelf will be different and T&Y present no evidence to that effect.