RaceQs Tracking and 3D Replay (iOS/Android)
September 22, 2014 at 5:46 am #541Paul WhiteKeymaster
RaceQs is not only a tactical application to help you during the race, it’s designed to allow you to record your sailing activities and review them afterwards – although others can review them in real time while you’re sailing.
There’s a version for the inexpensive Pebble and Garmin Smartwatches but since both have been abandoned by their manufacturers, RaceQs will switch efforts to the Apple Smartwatch (Dec 2017). As well as a countdown timer, the watch app gives startline bias, time to line, distance to line and once sailing COG, VMG and layline vibrate indicator.
Recording tracks is fairly simple, you just install the (free) App, register with an ID and password, add your boats by selecting your boat type (or add a custom one if not listed) and then start the track recording in the App (or pre-set the start time). Log in to the website at raceqs.com to update your profile and add photos of you and your boat.
After the race, click to stop tracking and you can then upload the track to the website. From the website Journal you can replay the race in 3D. If you have a video camera recording your sailing (See Suckastick no-holes camera pole mount for $20 here) , you can also replay the RaceQs data alongside your video (aka GeoVids).
RaceQs will deduce the wind, VMG and mark locations from your track.
1) Wind direction. The app uses a rule based algorithm which assesses the likely wind direction based on the tacking / gybing angles and course shifts on close hauled POS (likely headers and footers). Estimated margin of error is about 3 – 5 degrees in the single boat mode and 1 degree with 5 or more boats are on the race course. This method of calculating VMG although not exact, incorporates the current impact and is more accurate than VMG toward wind without adjustment for the current.
2) Mark location. For the “stationary marks” we use NOAA database of all navigation marks in the US and is working to build such database worldwide. For the “temporary marks” the rule based engine “estimates” the mark location based on the boat(s) mark rounding pattern. The same logic as above a single boat will have about 95% accuracy rate guessing the mark location and with several boats on the race course it is 99 % accurate. Users can add, delete and modify mark location during the race replay as necessary. The key element for both wind direction and mark recognition is correct location of the start line, which needs to be provided by at least one boat either during the race or after the race during the race replay.
The start line tells the program: a. The fact that that a boat is in the race and RaceQs can utilize mark / wind recognition algorithm. b. The fleet – all the boats who crossed the line with you, therefore RaceQs can use multiple boats wind / mark detection.
September 23, 2014 at 9:53 am #542WETA NSWParticipant
I down loaded this it looks like a really fun app to have , be great with a stack of boats running it at a regatta . i will get howled down for this but i’d love to start the SPEED PUCK CHALLENGE world wide for the fastest speed recorded in a WETA ? Who wants to hold the record as the fastest in the world ????
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