Extended wooden arm consisting of pen (0.1) on drawing platform
Walking along the coast, toes beneath the sand, the tide hits the shore and drowns you knee deep for only a moment. Tides are the longest of oceanic waves. So long in fact, that they are often observed as a mere rise and fall of sea level over a duration of several hours. The importance of tides around the coast is the currents they generate. These exaggerate with seasonal change, and as well, differentiate in velocity throughout the morning, afternoon and evening. The seismographic drawing machine documents a duration of the current’s energy, character and force. A variation in line weight differentiates the strength of the current while repetition shows consistency of the waves. Incoming currents enter the drawing an at angle, whereas the return of the pen is caused by a linear pull of gravity. Such patterns can explain the tide felt by a visitor of any coastal beach across the globe.
Goutham Santhanam & Sidharth Kumar