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Manoeuvre analysis
For sailing boats: for every tack and gybe in the logbook you open a separate analysis with one tap. On a map you see your course before and after the manoeuvre, plus speed over ground, sea state and heel in the four minutes around the manoeuvre and an overview with manoeuvre angle and wind angles. For tacks, the tack score shows how many seconds the tack against the wind cost you. You do not have to enter anything. On board the data comes straight from the Hub, without internet and without a subscription; if you connect the Hub to the cloud, you also see your manoeuvres from home, and so do your Boat Buddies.
What you get
On board
- Overview with these figures:
| Row | What it shows |
|---|---|
| “COG angle” | by how many degrees your course over ground changed, from the leg before to the leg after the manoeuvre; for tacks in colour: small angle green, around 90 degrees yellow, large angle red |
| “Tack score” (tacks only) | how many seconds the tack against the wind cost you; 0 means no loss, minus 20 means 20 seconds lost, a positive value means you even gained height in the tack; green around 0 and above, yellow around minus 20, red from about minus 50 |
| “AWA” Before / After | apparent wind angle on the leg before and after the manoeuvre |
| “GWA” Before / After | true wind angle over ground on the same legs |
| “Total” | by how many degrees your boat turned through the wind |
- How the app calculates the tack score: From speed over ground, course over ground and ground wind direction it works out how fast you gain height against the wind. It compares the value 90 to 60 seconds before the manoeuvre with the two minutes around the manoeuvre and calculates how many seconds you would have needed less for the same height on an unchanged course.
- Manoeuvre map: the trace of the four minutes with two course lines for the legs before and after the manoeuvre up to their intersection, at the top left the average ground wind strength with a direction arrow.
- History views: speed over ground and sea state, each with average, maximum and a marker for the time of the manoeuvre, plus the heel, where you see the change of side.
- On a tablet the history views, overview and map sit side by side, on a phone one below the other.
Remotely
- If you connect the Hub to the cloud, you also open the same analysis from home, and so do your Boat Buddies: without a subscription for the manoeuvres of the last 3 months, with the Standard subscription for all manoeuvres permanently. For family or a coach ashore this is where they can follow a single manoeuvre.
How it works
From the logbook
- Open Menu › “Ship’s Log”, optionally with the filter “Maneuvers” to show only tacks and gybes.
- Swipe a tack or gybe aside and tap “Maneuver”.
From the map
- On the Plotter map or the large map, tap a tack or gybe symbol. The “Maneuvers” layer is switched on when opened.
Back takes you to the previous period.
Requirements
- A tack or gybe in the logbook, detected by the Hub or entered by yourself.
- Wind sensor for wind angles, ground wind and tack score. The Hub’s GPS supplies course over ground, its motion sensor supplies heel and sea state.
- On board: app connected to the Hub. Remotely: Smartboatia ID and internet on your phone or tablet.
Permissions and subscription
| Boat subscription | On board | Remotely |
|---|---|---|
| Without a subscription | Manoeuvres of the last 400 days | Manoeuvres of the last 3 months; a fresh manoeuvre appears with a delay of up to 6 hours |
| Standard subscription | Manoeuvres of the last 400 days | in addition all manoeuvres permanently; a fresh manoeuvre appears after about a minute |
- On board: Everyone connected to the Hub. Remotely: you and your Boat Buddies. There is nothing to set or edit.
Notifications
None.
Messages and special cases
| Situation | Display |
|---|---|
| Value still loading or missing | Placeholder ”-.-°”, ”-°” or ”-.-” |
| No wind sensor | Wind angles ”-°”, tack score ”-.-” |
| Tack without gain in height, for example avoidance manoeuvre or circle | Tack score ”-.-” |
| Fresh manoeuvre remotely without a subscription | empty history views until the Hub has transferred the data |
| No internet remotely | Placeholder, no message |
Offline behaviour
- On board entirely without internet, logbook and measured data are on the Hub.
- Remotely you need internet, and the analysis reloads each time you open it.
- A Hub restart changes nothing about stored manoeuvres; if the restart leaves measured data missing in the section, the values stay empty.
Frequently asked questions
How do I open the analysis of a tack or gybe?
For sailing boats: swipe a tack or gybe aside in the logbook and tap "Maneuver". Or tap a tack or gybe symbol on the map.
What does the tack score mean?
It shows how many seconds a tack against the wind cost you. 0 means no loss, minus 20 means 20 seconds lost, a positive value means you even gained height in the tack.
What does the "COG angle" show?
By how many degrees your course over ground changed, from the leg before to the leg after the manoeuvre. For tacks a small angle is green, an angle around 90 degrees yellow and a large one red.
Do I need a wind sensor for this?
For wind angles, ground wind and tack score, yes. The Hub's GPS supplies course over ground, its motion sensor supplies heel and sea state.
Why does the tack score show "-.-"?
Either a wind sensor is missing, or the tack had no gain in height, for example with an avoidance manoeuvre or a circle.
Can my coach or my family look at the manoeuvres from home?
Yes, if you connect the Hub to the cloud and they are your Boat Buddies. Without a subscription this applies to the manoeuvres of the last 3 months, with the Standard subscription to all manoeuvres permanently.