MARITIME – TIDE & TIDAL TREAM CALCULATOR
Co Tidal Chart Interpolation
A precise tool.
What is the Co Tidal Chart Interpolation & How does it work?
Coβtidal charts represent the phase of the dominant tidal constituent across a basin, allowing the tidal height at any point to be estimated by interpolating between known stations.
The interpolation assumes a linear variation of amplitude and phase between adjacent stations, which is valid for regions where the tidal wave propagates without significant distortion.
By combining the interpolated amplitude (A) and phase (Ο) with the astronomical argument (ΞΈ) for the desired time, the tidal height can be reconstructed using the harmonic sum.
h(t)=sum_{i=1}^{N} A_i cos(omega_i t + phi_i)
h = tidal height (m)
Parameters
Result
β
Frequently Asked Questions
What is a Co-Tidal Chart?
A Co-Tidal Chart shows the phase of the dominant tidal constituent across a basin, allowing you to estimate tidal heights at any point.
How does interpolation work in Co-Tidal Charts?
Interpolation assumes linear variation of amplitude and phase between adjacent stations, valid where tidal waves propagate without significant distortion.
What information is needed to calculate tidal height using a Co-Tidal Chart?
You need the interpolated amplitude (A), phase (Ο), and the astronomical argument (ΞΈ) for the desired time.
Why are Co-Tidal Charts useful in maritime navigation?
Co-Tidal Charts help estimate tidal heights at any point by interpolating between known stations, aiding safe navigation.
What assumption is made about tidal wave propagation for interpolation to be valid?
The interpolation assumes the tidal wave propagates without significant distortion.
Can Co-Tidal Charts be used in areas with complex coastal geometry?
Co-Tidal Charts may not be as accurate in areas with complex coastal geometry where tidal waves are significantly distorted.
How often should I update my Co-Tidal Chart data for navigation?
It’s recommended to use the most current Co-Tidal Chart data available to ensure accuracy in tidal height estimations.
Results are for informational purposes only and do not constitute professional advice.