Open a station's row under My Stations for its own page: how much of the time it has been working, where it has been hearing boats, and what it has been hearing over the last 30 days.

No other member sees any of it, and stations are not ranked against each other. The gear at the top right holds the station's settings on a page of their own: the address to point the receiver at, where it listens from, its name, switching it off, and removing it. A receiver you have just added and that has not sent anything yet opens straight on those settings, because the address is what a new receiver needs first.

The figures

The page opens with a card of five numbers.

• The big number is the boats your station heard in the last 24 hours, and beside it what it hears on an average day across the same 30 days the chart below draws, so you can tell a busy day from a quiet one at a glance. Older history does not affect either figure.
• The last hour: boats heard just now, and of those, the ones only your station reported. No other receiver or feed reported those boats, so they are on the map because your station heard them. Your other stations count as other receivers here.

The only-your-station figure is usually lower where other receivers cover the same water. It measures your station's contribution to coverage, rather than the quality of its equipment.

A boat counts once however many times you hear her, and only boats count: aids to navigation, base stations and search aircraft are kept, but are not counted as boats and do not shape the coverage area.

The boats your station heard

Tap the boats figure at the top of the card for every boat behind the figures, on a page of their own, grouped the way the figures count them:

• Last hour, split into Only your station and Also heard elsewhere: the same split as the last-hour figures, so each count in the card has its boats here. A boat your station heard in the last hour by name alone, without a position, is listed under No position heard: whether anyone else reported her cannot be measured that way.
• Earlier: boats heard in the last 24 hours but not in the last hour. They are not split by who else reported them, because only your station is measured over the last hour.

Last-hour boats are in alphabetical order, so the list stays still while the page refreshes; earlier boats are listed most recent first. Each row says when your station last heard the boat. A longer list has a filter for a name or an MMSI, and a long group shows its first boats until you open the rest. Tap a boat to see her on the map; going back returns you to the same place in the list.

Aids to navigation, base stations and boats that sent no position are not counted as boats, and the list ends with how many of those your station also heard. A very busy station lists the boats it heard most recently, and says so.

Uptime

Uptime is the share of the time your station was hearing boats, over the last 24 hours and over the last 30 days. It counts from the minute you added the station, so a receiver you paired this morning has a real number straight away, and a station younger than a day shows one figure rather than two, because two would be the same measurement twice.

Time is counted in ten-minute blocks, and a block counts when your station heard a boat's position in it. One boat is enough: a marina of moored boats reads as time spent hearing, because your station heard them. A still night in an empty anchorage lowers the figure even when the receiver is working normally, so the same receiver reads higher in a busy port than in a quiet bay.

Time the station is switched off counts against it. The figure measures the whole window, from the day you added the station, and a station that is off is not hearing.

Two things that help make sense of a low number:

• If your receiver is a transponder it hears your own boat, and she counts like any other, so an anchorage that is empty apart from you still reads as time spent hearing.
• For a phone, the app hears while it is open and connected, and locking the phone pauses it.

If your uptime is low and the water around you is empty, the low figure reflects the lack of traffic.

The coverage area

Under the figures, a map shades the area around the boats your station heard in the last 24 hours. Each boat is drawn as one dot, at the latest position your station heard from her. The boats counted as only your station in the last hour are drawn in a colour of their own, and the key under the map labels both colours. The edge is a solid line drawn straight between the outermost positions, so it can cross land.

Fewer boats in range make the area smaller, even when the receiver is working normally, so a quiet day draws a smaller shape than a busy one with the same receiver.

• Your station is marked where its position is set. A receiver without a position is not marked, and a position can be set for it under the gear; a phone sets its own while it is sharing.
• A station on a boat that moves, such as the app on a phone aboard, draws an area that can stretch along the boat's route, because the boats it heard are spread out along that route.
• When too few boats have been heard to enclose an area, the page says so instead of showing a map.
• A very busy station draws dots for the boats it heard most recently, and the note under the map gives the number drawn. The shaded area still includes all the boats it heard.

Tap the map to open it full screen, where it can be moved and zoomed. The area is drawn from the same boats as the 24-hour count above it, and no other member sees it.

If the full-screen map cannot refresh, it shows a notice with Retry, and any coverage area already drawn stays on screen as last loaded. The notice clears when a refresh succeeds.

Boats heard each day

The first chart draws every day your station has been running, up to the last 30, plus today as it fills in. A young station draws the days it has had rather than a month of blanks.

• The full column is the boats that sent a position and this station heard, counted once per day.
• The part at the foot of each column, in the colour the key gives Only your station all day, is the boats only your station heard all day: the ones no other receiver or feed reported at any time that day, including any other station of yours.

That part is the coverage nobody else was giving the network. As more receivers join near you it falls; that comes from the network growing, not from any change in your station.

A day is a stricter test than an hour. A boat that another receiver or feed reports now and then can count as only your station for the last hour and still have been reported elsewhere earlier that day, so the day's figure can be lower than the last hour's. The chart's key and readout say "only your station all day" for that reason.

Range each day

The second chart is your station's range each day, in nautical miles: how far it reached.

It is measured from the traffic itself. We take the two boats farthest apart that your station heard that day and read half the distance between them, because a receiver sits somewhere in the middle of what it hears. It is an estimate rather than a survey, and it needs no position for the receiver, so it works from the first day of every station.

A quiet day reads low even when nothing has changed aboard, so read it as a trend over a week rather than as a measurement of your aerial.

Tap or drag across either chart to read a single day. It opens on the most recent finished day; today is the last column, still filling in.

Days run midnight to midnight UTC, so a day's column may not line up with your own calendar day. A day's figures are fixed once it has ended.

Days with nothing to show

A day you added the station, a whole day it was switched off, and a day we have no record for are drawn as a faint tick on the baseline rather than a bar, because nothing was heard and there is no measurement of the water to draw.

The daily average is a different question, and it counts every one of the last 30 finished days, or every finished day since you added the station where that is fewer. A day the station was switched off counts in it as a day with no boats, so a station run on one day of thirty, hearing 50 boats, averages two a day and not fifty. The day you added the station and a day we have no record for are the two that stay out of it: on the first the station did not yet exist for most of the day, and the second is a gap in our records.

That is why the chart and the average can look like they disagree about the same day. The chart shows what the station heard, and the average measures its contribution; on a day the station was not listening, there was nothing to measure.

What the figures can earn

The 30-day uptime, the boats-a-day average and the middle day of the range chart, read as the month ends, are the three figures that earn Plus or Pro for the following month. The bar for each is under How to get Plus or Pro for free.