A list is a set of boats you keep together, the way a playlist keeps songs: your favourite boats, the wooden ones in your bay, the superyachts you photograph. Adding another boat to Favorites or a custom list follows her. The automatic Boats you photographed list and lists you subscribe to work differently, as explained below. Your own linked boat can be on a custom list without using a follow slot. If what you want is a group whose boats all see one another and share a chat, that is a fleet rather than a list: Lists or a fleet?

Open Lists in the map's controls and the panel shows your lists, each with a switch that draws its boats on the map. All on and All off at the top set every one of them. Switch a list off and its boats leave the map, the ones in view included: they show as ordinary traffic until a list that contains them is switched on again. You still follow them, and a boat's page still says so. Tap a list for its boats, grouped by what they are doing, with a line each on where she is and when she was heard.

Favorites, and the boats you photographed

Two lists are yours from the start and never count against your plan's list number.

Make a list

Choose New list at the bottom of the Lists panel. A name is all it needs; a description is optional, and so is a note on any boat ("steam engine from 1930"), which everyone who can see the list can read.

Three ways to put a boat on a list:

A boat counts once toward your plan however many of your lists she is on. Taking a boat off her last list stops following her, and the panel says so, naming the lists she is leaving, before it does.

Adding a boat to your list can notify a linked AIS Fleet member or Saillogger owner, naming the list. Most vessels have no linked account to notify. The owner's notification settings determine how the notice reaches them.

Each row carries the boat's photograph when there is one, her name, and where she is now; a boat without one is listed under her initials. Photos on a vessel

Boats are listed in the order you added them, and Move to top on the settings page puts one first. That order matters once you share the list: a subscriber on a smaller plan sees the first boats first.

Each list has its own notice rows, behind the row at the top of the list's roster and on its settings page: the departure and arrival notices, in the app and by e-mail, and, once your boat is linked and heard on AIS, a second row that tells you when one of its boats comes within a distance you choose of your boat. Favorites is on from the start, at 3 nautical miles for the second row; every other list is quiet until you turn it on. A boat notifies you when any list she is on says so, and her own switch under Notification settings can only quieten her notices. When a boat comes near yours

Share a list

Turn Public on under the list's settings and a link appears. Anyone signed in to AIS Fleet with that link sees the list, your notes, and your name (your boat's name when one is linked), and can subscribe to it.

Sharing a list sends its boats' owners no new notice: they heard when you added them. While Show on its boats' pages is on, the list also appears on their boats' pages, as described below. Turn Public off and the link stops working; subscribers are told the list is no longer shared. Delete the list and they are told it ended. A list's link is never given to another list. The photographed list cannot be shared.

Lists on boats' pages

When you share a list, Show on its boats' pages is turned on with it, so the list reaches people through the boats it holds as well as through its link. You can turn it off under Public at any time, and the link keeps working. There is no directory of public lists.

Only signed-in members see your description and your notes. A name with a web address, an e-mail address, an @ sign, a phone number, a latitude or longitude, or another tracking service's name in it cannot appear on boats' pages. AIS Fleet can remove a list from boats' pages after it is reported from one of those pages, and the list's settings then say so; its link keeps working. A boat's owner can also keep lists off that boat's public page. A list that names one of its boats or your linked boat in its title stays off public pages while her name is hidden from those lists. If you shared a list from the iPhone app before the app offered Show on its boats' pages, that list stays off boats' pages until you turn that switch on under Public.

Putting the link somewhere people will find it still helps: a forum post, a club page, a caption.

Subscribe to a list

Open a link somebody shared, or a list in the On public lists section of a boat's panel, and the list opens with Subscribe, so you can look before you commit. The list also tells you how many of its boats your plan will keep, before you decide. On the website, Subscribe is at the top of your Lists panel; in the app, it stays at the bottom of the screen. A list opened from a boat's panel has a back button at its top that returns you to that boat.

Subscribing puts its boats on your map and, once you turn the notices on, tells you when they depart or arrive; every change its creator makes reaches you as it happens. The creator's other public lists are offered under the same list.

Subscribing does not make you a follower of each boat. Her owner is not told, you are not on her followers page, it opens no messages, and you see of each boat what AIS shows. A notice that reaches you through a subscribed list names the list it came from and carries no message action. Follow a boat you want to keep whatever happens to the list, and she joins your Favorites.

Subscribed lists have a switch for the map and their own notice rows, off until you turn them on, the nearby row included. Unsubscribe is beside the creator's name at the top of the list, and again behind the gear.

What your plan counts

Your plan sets how many lists you keep, made and subscribed to counted together, besides Favorites and the boats you photographed. See Plans and billing.

The boats across your lists count toward the same follow limit as the boats you follow directly, and a boat on two lists counts once.

Subscribe to a list bigger than the room you have left and its first boats fill it; the rest wait under Beyond your plan, listed but not drawn and not announced, because of your plan's follow limit, as the group explains. A boat you follow is always covered first, so following one is how you choose which boats fill your room. Make room, or move up a plan, and the rest come through.

Move down a plan and the lists beyond it pause. The Lists panel groups them under Not on your plan, with the plan screen as their one action; a paused list of yours is frozen (nothing added, nothing drawn, no notices) until you make room or move up again, while anyone subscribed to it keeps seeing it as it was. A list that its creator stopped sharing, or deleted, is grouped under No longer available until you remove it.

The same goes for the boats you follow: past your follow limit, the boats you followed first stay live and the rest wait under Beyond your plan, still yours and still listed, until you unfollow one or move up.

Lists or a fleet?

Both put a group of boats on your map. Beyond that, they work differently.

A list is something you do; a fleet is something a group does together. Putting a boat on a list is one way: she joins nothing, and neither she nor her owner sees the list unless you make it public. No agreement is needed, and AIS Fleet does not ask for one. A well-known expedition boat can be on thousands of strangers' lists without being in a group with any of them.

A fleet works in both directions. Everyone in it sees the same roster, reads the same chat including what was said before they arrived, and can write to any of the others one to one. What everyone in a fleet shares

What differs A list A fleet
Who adds a boat You, to a list of your own Its organizer, to a shared roster
Which way it works One way. You watch the boat Both ways. Everyone sees everyone
What her owner sees of it Nothing, unless you publish it The whole roster, from the day she joins
A chat None One, including messages from before she joined
Who else can see it Nobody, unless you publish it Its boats. A fleet started on Saillogger can also have a public map
What it costs you A follow per boat, and one of your lists Being in one uses one of your active fleets. Running one is a separate allowance on a paid plan

A list add needs no agreement, but her owner can be told. Adding a boat to Favorites or a custom list follows her, and whoever is linked to her here is told: an AIS Fleet member who has claimed the boat, that is, proved she is theirs, or the Saillogger owner linked to her MMSI. A custom list is named in that notice; Favorites arrives as a new follower. From then on you are on her followers page, either of you can write to the other, and her owner can remove you as a follower, which also takes her off every list of yours she was on.

A fleet add reaches further, and only some boats can answer it. An organizer can put any MMSI on a roster, but only a boat with an account linked to her, claimed on AIS Fleet or logging with Saillogger, has anybody in the roster and the chat; the rest are markers on the fleet's map. A boat claimed here is always told when she is added, whatever her owner's notification settings say, and can leave in one tap. A boat nobody has claimed can be put on a roster with nobody to tell. What a membership carries is also bounded by your own plan: past the fleets it keeps active, one is listed and carries nothing.

A boat can be on your lists and in your fleets at once. On the chart she is drawn as a boat you follow, which is why switching her fleet off does not take her away.

Which one you want

A list cannot be turned into a fleet, or a fleet into a list. The two are built separately, a fleet's roster boat by boat.