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Brass View Drop Down
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Post Options Post Options   Quote Brass Quote  Post ReplyReply Direct Link To This Post Topic: Flag Signals
    Posted: 04 Nov 21 at 12:47pm
Looks like Starcross has got it taped.

RRS Appendix G was changed in 2021 to make it crystal clear that if sail numbers can't be read the boat is breaking rule 77. It's trivially easy for boats to get new numbers in proper contrasting colours and stick them on over the old ones. If boats are breaking rules and inconveniencing the race committee, you know what to do.

If you're using flags and are fussed about precisely syncing between line sight and flag drop, use a second camera with a WA lens to record the flags or position the primary camera behind the flags so they are in shot.


Edited by Brass - 04 Nov 21 at 11:17pm
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davidyacht View Drop Down
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Post Options Post Options   Quote davidyacht Quote  Post ReplyReply Direct Link To This Post Posted: 04 Nov 21 at 12:18pm
Mark, 

I would be interested in talking through the high resolution camera should we meet at some time ;-) .  We have looked at cameras on the Salcombe line and struggle to find anything that has good enough resolution to read sail numbers of boats at both ends of the line ... let alone those pesky HD numbers on a grey mylar background glistening in the sun!

Also there is a synching issue with the flags, and whilst cameras may be good if you can wind forward or back to identify miscreants, it is less easy to ensure that a particular frame was taken at precisely the right moment.  Not saying it can not be done, just don't know of the technology.
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Post Options Post Options   Quote Brass Quote  Post ReplyReply Direct Link To This Post Posted: 04 Nov 21 at 11:29am
Just a few personal opinions. Your club should do what your club wants to do. Within the RRS of course.

Automate. If you can automate visual signals using lights, go for it, but beware of getting hideously complicated light sequences that nobody can remember. Beware of LED screens and high intensity lights that are too highly directional. LED screens might be a bit of a big budget item. I'd be inclined to look at the revolving beacon type lights, or maybe strobes with necessary colours or coloured screens. I think you could get by with 3 colours as Wetabix proposed and I discussed upthread. You can't do everything that you can do with a full flag locker, but for club racing you can get by.

Use flags in sticks. Way easier than pole and halyard. You can double end some: AP and N, X and 1st Sub, etc.

5 starts with 10 minute sequence is very relaxed for the race management team, but it's robbing the competitors of 25 minutes of racing time, and if you General the first Class, and send them to the back of the queue, they lose 50 minutes of racing time, and then go tramping over the top of all the slower classes that are now in front of them. I'm sure Davidyacht has thought about this, and it might be an acceptable price to pay for automating the system, but if you automate your whole system, the system can easily cope with standard 5 min rolling starts.

Clubs should work hard at recruiting and refreshing race management people and NOT take a pride in running races on the smell of an oil rag. The more tasks a race management person has to do at once, the more chance they have of screwing up one or all of them.


Edited by Brass - 04 Nov 21 at 11:14pm
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Post Options Post Options   Quote marke Quote  Post ReplyReply Direct Link To This Post Posted: 04 Nov 21 at 10:42am
My club (Starcross YC) produced a spec for a start lights and air-horn hooter system more than 20 years ago and had it built by a local electronics contractor.  It has worked absolutely reliably since then for all our club racing.  With one click of a button the OOD can run the lights and sound sequence for up to five fleets - leaving the OOD to focus on dealing with OCS and general recalls.

lights system diagram

The lights are mounted on a flag mast which forms one end of the start line - layout of lights is shown above.  Each of the five fleets has two coloured lights for the start signals - the lights are set at slight angles to widen the field of view and also to provide bulb redundancy (though the bulbs actually last for years).  We use a 6/3/0 start sequence - at the warning single the fleet light flashes, at the preparatory signal it is displayed continuously, and the light goes out at the start.  The preparatory signal for fleet 1 is the warning signal for fleet 2 and so on. There are also two strobe lights used in combination with the fleet lights to indicate postponement, individual recall, general recall, shorten course and race abandoned.  The only flag we use is the C flag to indicate a change of course before the start.

We have just added a high resolution camera system linked to the lights system which records video to support OCS decisions and checking finishing positions.  The lights system is also synched with our computer timing system as most of our racing is done on a handicap basis and with an average turnout of ~40 boats (and a max this season of 66) the OOD doesn't need to be getting involved with handicap calculations.

I don't think we'll be rushing to go back to flags anytime soon.
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Post Options Post Options   Quote davidyacht Quote  Post ReplyReply Direct Link To This Post Posted: 04 Nov 21 at 10:05am
Originally posted by Wetabix

Are there really places where there are fifty boats on the water? (Chew valley perhaps?)

Sail at Salcombe, we had weekends this year with over 50 club boats on the water, however to be fair the average was 32 boats with an average of 16 Solos on the line.  

Ref. the original post, we have five starts at 10 minute intervals, if there is a general recall then that fleet goes to the back of the queue.  

The 5 minute gap between the start and the next class flag gives the RO a bit of breathing space.

We have a bespoke starting system developed by a club member, but the system could work just as well with Autohoot (but with no countdown lights).

I did note a few weeks ago that an older RO gave an individual recall by holding the Class Flag at a dip, fortunately the demographic of the Solo fleet understood the signal and those over went back.  It made me reflect that this was an easier way of doing things when short handed in the race box.


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Post Options Post Options   Quote Wetabix Quote  Post ReplyReply Direct Link To This Post Posted: 03 Nov 21 at 5:41pm
Are there really places where there are fifty boats on the water? (Chew valley perhaps?)
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Post Options Post Options   Quote davidyacht Quote  Post ReplyReply Direct Link To This Post Posted: 03 Nov 21 at 4:01pm
We are on a 10 minute automated cycle with 5/4/3/2/1 countdown lights and hooters in the system.  In the event of a general recall fleet goes to the back of the queue.  It is possible to run the system on your own ... you leave the timer and hooters running in the back ground and do the flags manually.  On a Wednesday evening happy to do the finishing times on my own, but really need a second person for Saturday racing finishing times when there may be 50 boats on the water.  Really it is the Handicap racing that makes things complicated.

There probably is a way to do the visual signals with an LCD screen in this day and age, but this is above my paygrade.
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Post Options Post Options   Quote patj Quote  Post ReplyReply Direct Link To This Post Posted: 03 Nov 21 at 12:45pm
With an automatic box doing the times and hoots, the RO only has to do the flags. Our box starts the countdown before the 5 minutes giving time to be ready with the flag when the sequence starts.
And flags on sticks with a holder are great for boat starts from a "jaffa" where there's no proper flagpole.
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Post Options Post Options   Quote JimC Quote  Post ReplyReply Direct Link To This Post Posted: 31 Oct 21 at 8:01am
There's always an uneasy compromise between simplifying procedure and detracting from communication. Personally I think I prefer the separate recall flag on a stick. I very much admire the system Loch Lomond SC have - at least last time I was there with all the flags on sticks and a set of holders on every boat. Just lift the stick up on the gun, no messing with halyards, and put it in the holder at your leisure.
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Post Options Post Options   Quote Wetabix Quote  Post ReplyReply Direct Link To This Post Posted: 30 Oct 21 at 11:28pm
Blue alone is NEVER flown during the start sequence so if it suddenly appears out of sequence it HAS to be a postponement. Or you can let the sequence run and then do a general recall. Some boats will start anyway but a series of nineteen toots will bring most of them back!

Different subject: nearly all sailing instructions state that in the event of the failure of a sound signal, times will be taken from the flag. In the days when you were using a starting gun misfires were quite common but now that we have horns and whistles failures are quite rare. On the other hand in my experience with a single RO on his own flag signals are always late. My SIs say that in the event of failure of a sound signal times will be taken from the previous or subsequent sound.

Anectdote  In the mid sixties I was a Canberra pilot in Germany. In those days all briefings finished with a time check as most of us had wind up watches which were not particularly accurate. Time checks could be got from the Speaking Clock or the pips on the BBC. The Germans present complained that the (German) speaking clock was out of synch with the BFBS pips on the new fangled FM radio which was a second or two behind the Long Wave broadcast. A protracted argument ensued. Eventually our exasperated Nav Leader got to his feet saying 'Sir, there is only one time - God's time!'


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