Sun & Moon
Zora gives the sunrise, sunset, moonrise and moonset at the boat's position, where on the horizon each one happens, and how high the sun and moon climb. The tide for the same place is in the same window, on the Tide tab.
Open it
Tap the position in the app bar, then the Sun/Moon tab. The window's tabs are Info, GPS Sat, Sun/Moon, Weather and Tide. On a phone the tabs show only their icons.
The compass rose, the anchor view and the mooring view can show the sun and moon times in a bottom corner, under the title Astro. Tap that corner and the window opens straight on the Sun/Moon tab. To put it in a corner, long-press the corner and choose Sun & Moon.
The day on screen
The bar at the top picks the day: step back or forward a day, tap the date to choose one from the calendar, or tap the today button to come back. You can look at any day, past or future.
Times are in the time zone of the boat's position. Tap any time to switch to UTC; UTC times end in z. Tap again to switch back.
Sun
Each row gives the time, the event and an angle:
| Row | The angle |
|---|---|
| Rise | Where the sun rises, as a bearing, for example 087°T |
| Noon | How high the sun climbs above the horizon, for example 41° |
| Set | Where the sun sets, as a bearing |
| Dusk | None. This is nautical dusk, when the sun is 12° below the horizon |
Moon
The moon's picture at the top of its column shows the phase. The moon has Rise, Noon and Set rows. Its Noon shows two numbers, for example 54° / 178°T: how high the moon climbs, then its bearing at that moment. Unlike the sun, the moon does not always reach its highest point due north or south, so both matter.
A few days a month the moon does not rise or set on the day you are looking at; that row shows a dash in place of the time. Under the rows is the phase's name, for example waxing gibbous.
The clock
Between the sun and the moon, a 24-hour clock face shows noon at the top and midnight at the bottom. The outer arc marks the hours the sun is above the horizon, the inner arc the moon's. In the middle are the time now and the time zone's short name, or UTC; tap them to switch between the two. On today, a hand points to the time now.
On a narrow screen, the clock sits on top with the sun and the moon side by side below it.
True or magnetic
Bearings are true, marked °T. Tap any bearing to show them all as magnetic, marked °M, with the local variation applied, to compare with the hand-bearing compass. Tap again to go back to true. When Zora has no variation for the boat's position, the bearings stay true.
Near the poles
In summer inside the Arctic or Antarctic circle the sun may not set, and in winter it may not rise. On those days the Rise, Set and Dusk rows are not shown, and neither is the sun's arc. Noon is still there: it is the moment the sun is highest. In the polar night its angle is negative, the degrees the sun stays below the horizon.
Well outside the polar circles, around midsummer, the sun can stay less than 12° below the horizon all night. From about 55° of latitude, the Dusk row is missing on those nights.
The moon's Noon angle is negative too on a day the moon stays below the horizon.
Tide
The Tide tab shows the tide at the boat's position as a curve of height against time. It opens on today and the next two days. The arrows in the bar at the top step a whole period back or forward. Tap the dates to pick a period from the calendar, or the calendar button for Today, Tomorrow, Next 3 days, Next 7 days or Yesterday.
On the curve, each high and low water carries its height and time. The shaded bands are daylight, from sunrise to sunset, and a green line with the height marks the time now.
The button under the bar says whose tide it is: a tide gauge nearby, or Zora's own prediction, with the distance and direction to the gauge. Its icon says how far to trust it. Tap the button for the details: how many days are shown, the lowest and highest water in them with their times, the source, the zero the heights are measured from, and the position the tide was worked out for. To see what the icons mean and how Zora predicts the tide, see Tides.
When you pick a tide gauge or a point on the chart, the Tide tab shows the tide there instead of at the boat, and the button carries a pin. Close the window and the Tide tab goes back to the boat.
The first time, Zora downloads the tide data it needs, and shows Preparing offline tides meanwhile. With no internet at that point, it shows No internet until it can download. After that it works without the internet.
The tide shows in other places too:
- the tide corner on the compass rose, the anchor view and the mooring view, with the next high or low water, how long until it, and an arrow for whether the tide is rising or falling. Tap it to open the Tide tab.
- at anchor, on a mooring or at the dock, the Tools panel gives the tide when you stopped and the next high and low water. See Vessel state.
- on the chart, long-press a point and choose Tidal Info..., or show the Tide Gauges and tap one. See Charts.