bada.quest reframes the harbor as an instrument panel. Tide charts become progress bars, buoys become icons, shipping lanes become navigation paths. This is a tutorial, not a travelogue.
Twice each day the sea inhales and exhales against the pier. The chart below traces twelve hours of that breath. Hover any vertex to see the exact reading.
A single number tells you nothing. The slope between two readings tells you whether the tide is rising or falling, and how fast. The curve's steepest segments mark the strongest currents.
The flat moments — high water, low water — are not pauses. They are the instant when momentum reverses. A trained eye watches the second derivative.
Spring tides arrive near new and full moons; neap tides near the quarters. A tide table without a lunar column is missing half the story.
The wind moves the upper meter. Density and rotation move the rest. A swimmer feels only the first; a fish lives in the second.
The hull asks. The seabed answers in time. Multiply the round trip by half the speed of sound in water, and you have measured the dark.
Leave a line in the harbormaster's logbook and we will write back when the next chart is published. No promises beyond the tide.