dachopper

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About dachopper

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  1. dachopper

    Garmin Watch users - new Sailing Datafield

    Version 1.7 out now Fixed a bug in the Tack and gybe angle calculator, and the tack and gybe number calculator.... these are now working correctly. Tack / Gybe angle calculator uses your GPS track from 6 to 16 seconds before turning into wind, until speed is decreasing and track is steady after turning through wind
  2. dachopper

    Garmin Watch users - new Sailing Datafield

    Slick - give the Sail Racer App a go. The only thing it does not have right now is waypoint navigation, but it does give you a lot of extra info after a session.
  3. dachopper

    Garmin Watch users - new Sailing Datafield

    I'm not a programmer by trade, but it can connect via a phone, to get WEB data
  4. dachopper

    Garmin Watch users - new Sailing Datafield

    Sail Racer User Guide : version 1.5 When you first open the App, turn the watch left or right to decrease / increase the wind speed, and click (start) once your approximation of wind speed is displayed. This is not used in computations, but is displayed in your Connect IQ activity - Session Summary. Next, point the arrow into wind, and click next. This will store the wind direction, which is used for VMG upwind / downwind and angle off the wind calculations. If the wind changes during the session, you can re-set the wind from the Sail Racer main menu. Screens – currently there are 7 main screens, with the general purpose screen displaying first, selecting up or down will cycle through 3 speed oriented screens, and 3 navigation oriented screens. Access to the main menu, and start / stop session can be done from any of these screens. Most of the screens have local watch Time / Session record time towards the bottom, that will cycle between the two values every 4 – 6 seconds. Recording – Prior to recording, if you wish to also record Polar Data, select this option in the main menu. If you have done this in the past, then the watch will remember your preference. To start recording, click start, the watch session time near the bottom will change to RED colour and start increasing ( on all screens ) and the watch will vibrate once. To stop recording, push the same button, the watch will vibrate twice and the Save / Discard / Save and Exit / Exit menu will be displayed. Move up or down to select the option desired, and if Save is selected, the watch will vibrate 3 times to indicate save completed and exit, or be ready to record another session. Race Countdown – The race countdown uses a modified session recording time, to display a countdown for use in any pre-race countdown situation. To use this feature, simply start recording when the 5 or 10 minute gun / flag is displayed, and then enter the main menu to select the desired countdown. This will then be applied to the session time that is already running realtime. There are built in vibrations at 3 minutes, 2 minutes, 1 minute, 30 secs, 20 secs and from 10 secs to zero secs to go. The Speed 1 screen and Nav 1 screen will show the race countdown covering the entire screen, until time = 0, then go back to the normal display screen. You may also set the race countdown timer before you start recording in the main menu, and it will remain at – X minutes until you select record. Main Menu – To access the main menu from any of the 7 screens, hold the menu button for 2 – 3 seconds until the menu is displayed. To navigate use the Previous / Next buttons and Start to select an Item. -Reset Wind Direction -Enable Polar Logging -Edit / Enter Waypoint information ( Not Available until version 2.0+ ) -Edit / Enter Courses ( Not Available until version 2.0+) -Select Race Countdown -Select Activity Type – as shown in your Activity Summary in Garmin Connect -Adjust Tack / Gybe Filter The Tack / Gybe filter, allows you to set a minimum speed that needs to be held as you pass through the wind direction. This is to filter out tacks being recorded when you are walking around on the beach, floating in the water or walking on a boat deck. By default 2 kts upwind, 3 kts downwind. It’s recommended to set this higher if your tack or gybe angles occasionally appear incorrect. After a tack or gybe, the heading you are on will not be recorded until your speed has stopped increasing and is stable, to give an accurate tack angle Polar Log feature – this feature allows you to record polar data, to later obtain a plot of max speed vs wind angle on a PC / Mac. To use this feature first go into the main menu and enable polar logging. The instant log, records max speed Vs angle off the wind, every second without filters, and as a result, if you preform fast tacks / gybes / you will have unsustainable speeds recorded against some of the angles. The Average log reduces this by adding 5 seconds of recordings together, and averaging the resulting vector out. And by ignoring all speed values that occur when the heading is not steady. To record the polar log you must place a blank Text document on your watch in the Garmin / Apps / Log folder, and call it Sail Racer. Every time you record a session, or exit the watch application, the Polar log and tacking information will be overwritten. So if you want Polar data off your watch from a session, enable polar logging, ensure the text file is in the folder on your watch, Start the session, Save and exit once finished. Do not open the app again, until you have plugged it into a PC and copied the data from the text file. If you open the app before copying, or start another recording session, the polar data will be overwritten. Once Polar data is in the text file, you can copy and paste into a program such as MS excel, use the import wizard when you paste, click next and select Comma to separate the separate values. Then Highlight all the excel data boxes, right click quick analysis, chart, radar chart. It’s a bit of a pain, but the only way it can be done at present. Enjoy….. Nick
  5. dachopper

    Garmin Watch users - new Sailing Datafield

    Uploaded version 1.4 Today Improved display compatibility if you have a smaller watch resolution Added vibrations to all menus that save data + the race countdown at 3 min 2 min 1 min 30 sec, 20 sec, 10 secs. Added Tack and Gybe min speed filter ( adjustable ) to stop the watch recording a tack if you walk across a boat, or on the shore.
  6. dachopper

    Garmin Watch users - new Sailing Datafield

    They are both free - I suggest, try both, and if you don't need waypoint info - use the application as it offers a lot more.
  7. dachopper

    Garmin Watch users - new Sailing Datafield

    At the moment, if you are in Boat mode , and you add Sail Racer Data Field - it's only the one main page you can see ( because it's a datafield ) , and because you are in boat mode, you can select any waypoint on your watch, or a course and direct navigation.. and my datafield will give you the waypoint info ( distance, bearing off your track ). The Sail Racer Application - has 7 different pages you can look at, depending on what information suits you. the main page + 3 speed oriented pages, + 3 Navigation oriented pages. It also has race countdown, and generates two different polar logs of your race so you can figure out the best tacking angles / gybing angles to use. The main thing the Application does not do right now - is the waypoint navigation...because of the way Garmin implement the waypoints. ..... However, I am going to add my own code shortly that will be suitable for short course navigation shortly ( say within 60 nm ) - to bypass the garmin calculatior which is locked out. The reason I say short course, is because of earth curvature, you must take into account the curve if going say from perth to sydney, or else lots of your headings will be off. If your only going a short distance, curve is minor, and therefore if you assume the earth is flat, the result is > 99% correct, and shouldn't bog the watch calculations down.
  8. dachopper

    Garmin Watch users - new Sailing Datafield

    Version 1.2 uploading today. Added sport selection ( kitesurf/windsurf/Sail/ etc... ) with remembering of your preference Added record data- max speed of all time, longest distance all time, as well as session max and session distance to the activity summary on your phone. Session total number of tacks and number of gybes Formatted polar data for ease of plotting, with all values defaulting to zero. main menu has change wind added as an option in session. Added race countdown timer which can be set after you hit start, or changed on the fly in the middle of a countdown Coming shortly.... Tack angle and Gybe angle calculator, which will also be added to the session summary. Adding the beeps and vibrations. Question... at present when you start recording, the Elapsed time increases.... do you think you would like any other indication aside from ET counting up? I could add some red graphics easily? Or keep it clean it will be easier to read?
  9. dachopper

    Garmin Watch users - new Sailing Datafield

    Have a look at the top field when you rotate your watch, the very top. This is GPS track, however it will be compass if GPS track is not valid. If that is also increasing / decreasing it means no gps signal, or your not fast enough to log a track..
  10. dachopper

    Garmin Watch users - new Sailing Datafield

    If you are moving slow... like walking... the GPS track is often disabled and the watch uses the compass instead. I haven't looked at the data field since I got the app working, which is at a much higher state, although the data field was all working when I last used it, so I'm not sure??
  11. dachopper

    Garmin Watch users - new Sailing Datafield

    It uses GPS track, you can.look at your watch upside down and it will show the correct info the compass is only to Set the wind axis.
  12. dachopper

    Garmin Watch users - new Sailing Datafield

    Version 1.1 uploaded today - Race Countdown added, Polar log filter added to detect tacks / gybes and only log if you have a steady GPS track. If you donwload - please give the app a rating so it appears higher in the store visibility & I'll keep developing it. Waypoints are next on the list.
  13. dachopper

    Garmin Watch users - new Sailing Datafield

    Released version 1.0.0 now Polar functions work 3 Nav screens 3 speed screens 1 general screen Racing computer on your wrist!
  14. dachopper

    Garmin Watch users - new Sailing Datafield

    First Polar Graph made by my watch!
  15. dachopper

    Garmin Watch users - new Sailing Datafield

    Big progress this week, I re-did the calculations code, as something was destroying the performance, and now it's very quick, the Polar logs are now 0 degrees = into the wind axis and defaulted to off to improve performance. I have still not got around to plotting it, and garmin does not support that type of graph yet But I have created a dump of the data in either case, that is available in any watch if you Plug your watch into a PC, put a blank text document in the watch in the gamin /apps/ log folder called sail racer. Once you exit your activity the text document should have the polar data which you can copy / paste into excell and make your own polar graph.... for now The calculations for this use current speed and current track for the instant log, and I added the velocity vectors together to get a proper 5 second average vector for the average polar. ( this helps show speed reduction if you have an unsustainable burst of speed like roll tack. The VMG code is 100% accurate, it's using SIN and COS / pythag. to calculate. Next on the list... is the LIFT / KNOCK calculator and getting beeps / vibrations for menu items and top speeds Any ideas what people would actually define as a lift or a knock? how many degree change for how long? I've added a main menu to turn on / off polar graphing, and go back to set the wind., now have 9 screens ( 3 targetting for Nav, 3 targetting for speed and 2 general purpose.