Definition
Sums terms of the form f times H times cosine of the argument, where H is the constituent amplitude, f the nodal factor, and the argument combines the astronomical phase with the port's phase lag g. Admiralty Tide Tables Part III publishes harmonic constants for many ports lacking daily predictions, worked through the Simplified Harmonic Method form. Electronic almanacs and plotters perform the same summation, which is why they handle distorted curves properly.
Want to apply this on the water?
Ask Saily out loud for an example, a scenario or a simpler explanation.
Talk to Saily