Electronic instrumentation applied to small scale tests in ocean basins demands a very specific design, turning the use of commercial equipment a complex and challenging task to adapt these general purpose devices for specific needs. Under this perspective, the aim of the study is to discuss an experimental methodology to get the maximum wave impact pressure due to the slamming occurrence on a floating structure. This was demanded in a model test in the wave basin of LabOceano, COPPE/ UFRJ. The pressure instrumentation was based on a sensor’s grid measurement system. This allowed covering a larger area of the impact region. Due to the necessity of adapting the pressure sensor to an underwater use, all the calibration and mounting procedures, together with the difficulties and solutions will be presented. The importance of the results obtained motivates new tests and the improvement of the calibration and water proofing procedures. This kind of solution may be useful for other kinds of near water surface pressure measurements in ocean basins and towing tanks. The dynamic calibration procedures are very important for future studies. The events to be monitored can sometimes have a high frequency response. This will also be discussed.

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