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1868 Q. Jrnl. Microsc. Sci. 8 173 In the case of the reflection of light in the laminated structure of the rods, which may be compared to a set of glass-plates, a system of statical waves must be established (which can only take place..where the reflecting surfaces are at the proper distances apart).

1894 R. E. Froude Ship Resistance 19 The momentary horizontal position..finds its analogue in the momentary level of the outline of a different kind of wave—namely, an imaginary wave, the elevations and depressions of which are the statical equivalent of the differences of pressure which there would be if the surface were forcibly kept smooth... I will call this imaginary wave the ‘statical wave’.

1902 Encycl. Brit. XXXII. 587/1 At 19 knots the ship's statical wave has approximately the same length as the wave that would travel freely at the same speed as the ship.

1922 E. L. Attwood Theoret. Naval Archit. (ed. 6) ix. 324 This system is shown by the dotted profile of the water surface in Fig. 110, which has been termed the statical wave.

2009 51st Internat. Symp. ELMAR 169/2 The ship is positioned on a statical wave of given characteristics in a condition of equilibrium between weight and static buoyancy.