Wave explains ‘beast’ sighting

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THE description of “the beast” by Aldie Mackay reported on 14 April, 1933, which started the modern legend of Nessie (The Week, 24 February) is consistent with that of a standing wave, a wake-interference effect which is caused by the disturbance of a calm surface by boat movement out of sight somewhere on the lake.

Steuart Campbell, Edinburgh