4.3 General experimental set-up
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Statutory Documents - IMO Publications and Documents - Circulars - Maritime Safety Committee - MSC.1/Circular.1227 – Explanatory Notes to the Interim Guidelines for Alternative Assessment of the Weather Criterion – (11 January 2007) - Annex - Explanatory Notes to the Interim Guidelines for Alternative Assessment of the Weather Criterion - 4The determination of the roll angle Φ1 - 4.3General experimental set-up

4.3 General experimental set-up

  4.3.1 The roll motion was measured by means of an inclinometer, for which uniform frequency response was confirmed. Soft and slack cables were attached from the carriage to the model for power supply and signal recording. The whole ship motion was recorded by a video camera.

  4.3.2 The wave elevation was measured by wave probes for the waves corresponding to the minimum and the maximum frequency used in the tests. This was done without the model at 3 locations along the length of the basin, spanning a length wider than the expected drift range of the model, i.e. 7.1 m. The maximum variations among the three measuring probes with respect to the required value of wave height and wave period were 4% and 1% respectively.

Parent topic: 4 The determination of the roll angle Φ 1
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