So sorry I was late with the answer, I was watching SpaceX #10 launch that was scrubbed at 40 seconds. They may try to blow it up tomorrow.

I have noticed that, I had a good run and got to 2nd, then I got two wrong and I have been stuck around 7th or 8th even though I'm back on my correct streak. Would an (ahem) sizeable donation to the forum return my winning streak? 😌😌

Hardly encourages people top take part

Much like the odds of surviving depth charges if you torpedo misses 🤣

So if you get 1 wrong the odd are against you for 30 days ?

These questions are a bit off-piste. I did not expect to get it right either!
Roy

Rockabag, your score is correct, you have 22 correct, 8 wrong and 0 unanswered. You have todays correct. If you get the next 5 correct, you will see a change.

I happened again. I got the question correct but nothing changed. Im not very impressed with Ai.

Hi ed, the cat belongs to my daughter in law and was in Germany on the Amersee (7 miles long). Our son also used to sail her. The wind was up a bit and he said lets go sailing. It was blowing a bit when we arrived and set up the yacht. When out, it got stronger, no other yachts out, I was on the trapeze suddenly I was hanging in the water at the bow, I got hauled in rather wet.
We carried on with a reach and the speed went up and up and the bow descended at least 12 inches. I asked how fast we were going, he said you won't want to know! When we got in he said about 25 knots well we had overtaken a speed boat who looked at us in shock as we sped by.

He got a lot of respect in the yacht club after that!
Roy

Roy crewing on a cat is a great experience, I have crewed on a Formula 40, wet but fantastic.

Repeated question.

You want to complain? I want to complain! Look at the state of these new shoes, I've only had 'em two weeks and I'm sick and tired of this office!

I think this one has been on before but I am interested in Tri's and Cat's and knew the answer without looking at the options.

I have crewed on an Olympic class cat (Tornado) and the most comfortable position is on the trapeze. Got pictures somewhere of that.
Roy

The people that keep getting errors on QoD may be having K2C problems, just wondering
🤣

ROCKBAG,
Well you are complaining , so am I.
Two days running I have now come on here and it has said I had already answered the question.
I think something is not right here.
If they want to keep certain people on the top 100% then that's not right.
Not have the thing rigged to have it set to have it to auto answer for you without you coming on here.

Again, the correct answer is heavily hinted at in the question..

Why do I get questions correct but the number of correct answers stay the same?

Good evening everyone, and sorry for the late hour.

Let me start with two preambles.

1. I'm not a sailing expert, and I have neither your knowledge nor your experience.
My theoretical and practical knowledge is minimal, but it's more than enough to answer questions like this.
What I know is limited to classic sails. Even though I've followed all the latest America's Cup races with great interest (the next ones will be held in Italy), the AC 75s and all the foiling sailboats still leave me speechless. It's incredible that a sailboat can go faster than the wind itself; to me, it's magic. I'm joking, of course.

2. When I read these types of questions, I'm sure I'm wrong because I never interpret sentences correctly. I only understood the last one I got wrong after reading the comments; I had completely misunderstood. After interpreting the question correctly, everything seemed simple.

Today, I think I interpreted correctly.
If I'm wrong, sailing experts will correct me. If I'm right, I hope this helps others better understand the topic.

SITUATIONS DESCRIBED IN THE QUESTION

Initial situation (image A)
I believe the initial situation was the one shown in figure A, where you can see (from above) a boat sailing at a close-reach (bolina larga) pace.
I drew the close-reach situation as a possible example, but it could also have been close-hauled.
I interpreted the upwind situation as a close-reach or close-hauled pace.
If you look at figure C, you can see that the boat wants to tack (going upwind) and sail from A to point D.
The initial situation is represented by the section between A and B where the boat receives the wind (see red arrows) at about 45 degrees or slightly less.


Changed Situation (Image B)
If the wind changes direction clockwise, I imagined the situation in Figure B.
Since, by convention, we indicate the wind's origin (where it comes from, not where it goes, unlike the current), I imagined the wind coming from a direction toward 90 degrees, therefore toward the point of sail called BEAM REACH.
From CLOSE REACH, it changes to BEAM REACH, for example, or something in between.
See the red arrows in Figure B.
If you look at Figure C, point B is the point where the wind changes. If the wind changes clockwise, the black arrows indicate the new wind direction.

Be careful! It could be a change from CLOSE HAULED to CLOSE REACH (still UPWIND, I believe) instead of from CLOSE REACH to BEAM REACH.
In that case, see the fourth and fifth images.
In both cases, the situation remains the same.

CONSEQUENCES ON THE BOAT AND DECISIONS TO BE MADE

A boat sailing upwind, if it experiences a wind shift like the one described, certainly benefits in speed.
When sailing upwind (Close Haul or Close Reach), you feel like you're traveling very fast because the sloping wind and the true wind combine, so the apparent wind is stronger.
In reality, sailing downwind allows for greater speed.
Broad Reach is the best, even if it doesn't seem like it, because the sloping wind subtracts from the true wind, so the apparent wind is less strong.
Similarly (to understand the concept), if I'm sailing close-hauled and want to increase speed, I can bear away a little (by bear away, I mean moving the bow away from the wind).

At this point, receiving a favor (a small gift) from the wind, I have no reason to change course.
In my opinion, I shouldn't luff, bear away, tack, or gybe.
Maybe I could gybe, but I wouldn't do it because if the initial course geometry was correct, it still is (even better), so why change it?
In any case, I would accommodate the wind change by loosening the sails a bit depending on the direction.
Jybing or bearing away would make sense, but it's probably not worthwhile, while luffing or tacking is pointless, unless the final destination has changed.



AI RESPONSE

I don't understand what this part means: "...your current tack becomes more lifted relative to the new wind direction..."
I don't understand the reasons behind ruling out the other hypotheses. I ruled them out for other reasons.
Maybe I didn't understand at all and was just lucky in that case.




Can one of you more experienced sailors draw a race course diagram (with boat direction, initial wind direction, changing wind direction, and possible strategies)?

Well, Down again ☹️ !! I didn,t have a clue this time as the only sailing that I have ever done was a trip up the East coast on the Bridlington Belle ( without getting sea sick ), a few crossings to the Isle of Mann on the ferry,s and much earlier still, on a Swan two kid paddle boat at a lake near Blackpool or Morcambe Bay.😁🙄.
Even when I read the correct answer I was not much the wiser to the "key principle in advanced racing strategy" 🙄🤕..

Iam really angry, i didn't answer todays question. this should be put right.
when i came on it said i had alrteady answered the question.
😠😠😠😠😠😠😠😠😠😠🤔🤔🤔🤔🤔🤔🤔
how can this happen.
it's not the first time this has happened to me.
and yes i am shouting very loud about it.
👎👎👎👎😠😠😠😠😠😠🤔🤔🤔🤔🤔

I must stop answer these questions in the middle of the night when I get up for a call of nature

Shucks, I narrowed it down to two.
Then chose the wrong one🙄
DOUBLE POOK🐱🐱

😎

Likewise Roy!!

I got my clockwise and anti-clockwise muddled up. Never knew what time it was either!
Roy

Well I got that wrong. It's a long time since I did any dingy sailing but I thought I knew the answer. I always followed the wind shift. Maybe it is different in a larger boat. No idea. 😂🤣⛵👎

I have come on here today and it has told me that I have all ready answered the question. This is all wrong. I DONT KNOW WHY THIS DOES THIS. This isn't the first time this has happened to me. Some ting should be done about this happening. I know it happens to others.
😠😠😠😠😠😠😠😠😠😠😠😠😠😠😠😠😠😠

Not just yacht racing - it is even more important in dinghy racing, when wind shifts have more effect than tides. In offshore yacht racing this tactic has to be considered with other factors such as tides, which often have a greater effect.

Fortunately I have done some serious yacht racing 🤣

Steve, “Fighting lights” were two coloured lights, one above the other, suspended from a cross tree on the mast.
These provided a code to identify as friendly. The code changed every four hours.

I would agree with that - even for professional sea farers or officers of a Sail Training Ship

This is a question for serious yacht racing fraternity, a bit over the top for mere modellers.
🤔

You're right, Steve. We Teredo Navalis modelers don't care, unless you leave your model in the sea for days on end.
Very unlikely for us, hahaha.

No, that's fine; the forum should be a place for fun and learning, in my opinion.

However, I've seen scale ship models (static display models) covered in copper plates because they wanted to faithfully reproduce the original.

Ok; Alessandro, I will certainly remember the bad old Teredo Navalis the next time that I build a model boat with marine birch plywood.😀
But I will not be covering it with copper sheeting.😊
I think that I should be quite safe as I only sail my boats in a landlocked lake 😐☺.
Do you think that I should be taking the forum much more seriously???🤔. I have learned a lot since joining when I asked if anyone could help with the use of the operation of "fighting lights" on my HDML.

The "Teredo Navalis" is more infamous than famous.
In Italy, it's simply called "Teredine."
It's been well known since ancient times.
As Luckyduck rightly said, it was a major problem for wooden-hulled ships.
I love bivalve mollusks (especially because they're delicious to eat, like cephalopod mollusks), but Teredo Navalis have always disgusted and repelled me.

You're right, Steve, it's true, I had an advantage because the scientific name is closer to Italian than English.
However (being a fan of animals and taxonomy), I always identify animals by their scientific name.
It's represented by the binomial Linmeus (father of taxonomy).
The scientific name is valid and unique everywhere in the world. You can't go wrong if you use it.
If I see a blue shark (verdesca) I will say "Prionace Glauca" to make sure there are no misunderstandings.

Hi Pat.

Don't leave the Model Boats Forum. There are only about 2% of the 1,858 members doing the QOD on a regular basis, so it's not an important part of the Forum.

My sentiments exactly - to me the enjyable part of the board was learning things you did not know but I dont think some people take it seriously(they are only interested in seeing their name at the top of the ladder) - some openly admit why remember things - will be interesting to see how they get on when we have a massive cyber attack or a massive EMP pulse

Oh Pat! I have 4 wrong answers and one was a 'you have already answered the question' NOT. So I am banging around in the 80s.

I think that although it would be easy to cheat, why bother? I went for Teredo but thought it was a worm apparently it is a clam! So learned something there.

I was in IT and came across some very clever and widely read people. As one guy described himself "A mine of useless information" I know some must take it as a challenge as from a previous post to 'fix it', when there was a' you have already answered the question' response.

Out of boredom and not ready for bed I was listening to some 'revenge / hard done by stories on you tube. They are put together by A.I. and so riddled with errors, assumptions, lack of continuity and stupid situations that maybe the future is bright for us humans after all.

I work on the assumption that between us we know everything! It's like if asked about our son and myself. I say I taught him everything he knows, but not everything I know.

Don't give up Pat! Just a bit of fun.
Roy

Pat,
Re "It is statistically proven that ..."
BUT: There are lies, damn lies ... and statistics.

I never trust any statistic that I haven't falsified myself😁

😎

WOW I only knew that one from the 30 years of owning a boat.
Luckily I only had a fibre glass one.
I has a plaque on my Shetland 535 that said,
"If boat where meant to be built from fibreglass then GOD would have made trees from fibreglass".
I cannot BELIEVE that I have finally got up to 100%.
I will drop soon I know it.

That was a relatively easy process of elimination. I'm sure I've got Toredo worm in my left hip!

The toredo worm was the reason that so many wooden hullsed ships had copper plates added below the water line, added to the weight of the ship, but extended its life enormously. A toredo worm infestation could cripple a wooden ship within a year of being in the water.

I am mystified about the rules Pat refers to, where can I find them?
As I am high on the leader board, I am obviously cheating.🤔

I guessed this answer based on the same reasons as SimpleSailor. I thought they were looking for Naval Ship Worm and that gave me the best guess coming from an IT background as well

My answer today was an educated guess.

Well I managed to guess this one correctly today. Only because of my IT back ground. I had come across the word Teredo as used in the phrase "Teredo tunnelling" so putting two and two together with Navalis which looks like Navy I guessed correctly.

What is becoming more and more obvious to me this is not a test of people’s knowledge but a test of who cheats

With that in mind I have cancelled my subscription and will be closing my account at the end of the month

While I enjoyed the challenge of the question of the day - what is the point of the board ladder if all competitors do not follow the same rules, if you cheat it’s not about your nautical knowledge it about your ability to surf the net

Good luck to all those who continue

It is statistically proven that anyone has a 70% chance of passing an exam with multiple choice questions without any knowledge of the subject

There I see giving multiple choice is not a fair way of accessing someone’s knowledge

With this in mind I have cancelled my subscription and will be closing my account at the end of the month

Good luck to all those that continue

Ho bug**r, I see what you mean now with navalis, Doug,
😮 I should have gone for that but the only latin names I have come across have always had the same name twice as in Vulpes vulpes for fox and Meles meles for badger so I just went for the one with two names😆😆..
I couldn,t remember that question so it must have been before I got involved with this ☹️😭😭.

Didn't navalis give you a clue Steve?😉
Besides which we had this once before, quite a while ago I think.

😎

Didn't have a clue 🙄 without cheating. So I didn't.😔😔. No good with latin names probably easier for Alessandro 😁😁.