When completing an online Hold Mail request, a confirmation page will be displayed with a confirmation number to verify your request has been accepted. Make sure you print out this page or copy down your confirmation number for future reference.
The tidal range is the vertical difference between the high tide and the succeeding low tide. Tides are the rise and fall of sea levels caused by the combined effects of the gravitational forces exerted by the Moon and the Sun and the rotation of the Earth.
These waves roll upon the shore like a massive sea level rise and can reach far distances inland. The gravitational pull of the sun and moon on the earth also causes waves. These waves are tides or, in other words, tidal waves. It is a common misconception that a tidal wave is also a tsunami. The cause of tsunamis are not related to tide information at all but can occur in any tidal state.