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Tools for Setting Marks for Yacht Races

Printed From: Yachts and Yachting Online
Category: General
Forum Name: Race Management
Forum Discription: For race officers and competiors to discuss the topic
URL: http://www.yachtsandyachting.com/forum/forum_posts.asp?TID=13385
Printed Date: 09 Apr 20 at 12:33am
Software Version: Web Wiz Forums 9.665y - http://www.webwizforums.com


Topic: Tools for Setting Marks for Yacht Races
Posted By: Laser3
Subject: Tools for Setting Marks for Yacht Races
Date Posted: 19 Aug 19 at 5:37pm
I have developed a New Free WebApp tool to help race officers set up the marks for yacht races. You simply enter the wind direction and the windward leg length, and the tool provides the bearings and back- bearings for all Marks => for Both Triangle and Trapezoid courses. Another option provides lat/longs for all Marks after the user clicks a Geolocation button at the bottom mark as the reference point. No more fiddly tables.
I would like to get some feed-back on it. 
See https://www.setcourses.com" rel="nofollow - https://www.setcourses.com

some examples 
Triangle LatLong  =>   http://www.setcourses.com/triangle_latlong.html" rel="nofollow - http://www.setcourses.com/triangle_latlong.html

Simple Triangle 60-60-60 =>  https://www.setcourses.com/triangle60.html" rel="nofollow - https://www.setcourses.com/triangle60.html

Trapezoid Lat/Long =>  http://www.setcourses.com/trapezoid_latlong.html" rel="nofollow - http://www.setcourses.com/trapezoid_latlong.html

Cheers
John






Replies:
Posted By: davidyacht
Date Posted: 19 Aug 19 at 6:33pm
How do you get the app to try out?

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Happily living in the past


Posted By: Laser3
Date Posted: 19 Aug 19 at 6:44pm
It is a Web App which is accessed via the website (it is designed for mobiles)

http://www.setcourses.com" rel="nofollow - http://www.setcourses.com

some examples 
Triangle LatLong  =>   http://www.setcourses.com/triangle_latlong.html" rel="nofollow - http://www.setcourses.com/triangle_latlong.html

Simple Triangle 60-60-60 =>  https://www.setcourses.com/triangle60.html" rel="nofollow - https://www.setcourses.com/triangle60.html

Trapezoid Lat/Long =>  http://www.setcourses.com/trapezoid_latlong.html" rel="nofollow - http://www.setcourses.com/trapezoid_latlong.html


Posted By: Gordon 1430
Date Posted: 20 Aug 19 at 8:13am
Hi Laser3 
Does it off set for tide, if not it wont be much use on any sea venues as that's the tricky bit to calculate. most race teams for events use GPS on the ribs to ping the committee boat and then work the distance and angle from that. The distance for the windward mark is often worked out from the speed tables for the Olympic classes and working around whatever boats your setting for.
For a 400 use 470 for a 2000 use laser radial as a rough guide.
I will send a link to a National race officer friend for his opinion.
Cheers
Gordon


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Gordon
Phantom 1430


Posted By: Laser3
Date Posted: 20 Aug 19 at 9:42am
Thanks for that. 
Cheers


Posted By: Laser3
Date Posted: 20 Aug 19 at 6:23pm
The Bias box could be used for tides.
For regattas we have three boats for management. If the race officer (RO) decides there needs to be a course change for a Triangle course, due to a wind shift, he radios the new upwind bearing. All three boast adjust their setcourses tool setting. Boat1 moves the upwind mark using the new back bearing and RO checks the bearing => 'drop'. Boat2 moves the wing mark using the new bearings. RO and Boat1 check => 'drop'. We use bearings rather than lat/longs as we only have 2 GPS units (!!) and changing lat/longs is fiddly. Cheers.


Posted By: Laser3
Date Posted: 30 Aug 19 at 9:25pm
I have developed a MAP version draft.

It needs a Smartphone with GPS - which I don't have (!!) and so I need some one to give it a try and to provide some feedback 

see  https://www.setcourses.com/try.html" rel="nofollow - https://www.setcourses.com/try.html

This tool provides a virtual GPS unit for Laying the Marks.
=> Enter the Lat Long for the Reference Location Mark 3 or click RefLoc to set it for your location.
=> Enter the windward direction and your preferences for the reach angle and leg length, Then Click GO.
=> This will display a map showing the Mark layout and their positions.
=>Then, to set a mark, proceed in its direction. Click the ShowMyLoc button to show your current position as a 'dot'. Click it again and your new position will be plotted. Click GO to clear the 'dots'
=> If you need to relocate the marks due a wind shift, without moving the bottom reference mark (Mark 3), then simply enter the new direction and the altered position of the marks will be displayed.>To change the reference, either enter its new location, or go there and click MyLoc to reset all the course marks.
=>Note: Click MyLoc and ShowMyLoc buttons twice for better accuracy 
=> A Smartphone with GPS is required for accurate positions.



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