The tidal behaviour is never unexpected for the sailors and navigators. They use nautical instruments like tide clocks to judge the lunar and solar effects on marine and estuarine water. The tide clocks may not tell the exact tidal happenings but still they are designed to give a strong idea of the tidal stream. Even the people indulged in activities related to water sports, fishing, boating and surfing must use tide clocks to analyse the behaviour of oceanic water. It’s useful for people who often plan picnic at the beach.






