I'm just going to jump in and add my $0.02 worth.

From my perspective, I have made donations at the Bronze (lowest) level, and that allows me to look back at previous days. A "one time" donation does not last forever, mine expires this coming January. If you have made a donation in the past, but cannot "go back", Your donation has probably expired (no medal showing by your info),

I am treasurer for two clubs/organizations. As such I see what it takes ($$) to run a decent website. They aren't free (web hosting fees, storage fees, etc.), and they consume a fair amount of the Webmasters time. While running this site may not be a sole occupation, it should at least be worth the Webmaster's time. I think we all agree that we would miss the site if it went away. We all have (sometimes significant) investments in tools, and boats of our own. I think that a small annual donation to the site won't hurt any of us.

OK, stepping down from my soapbox now.

Roy, to answer your question regarding "going back", simply go up to the date tabs above the Question and click on any past date that is not green. The question will open, and you can answer it.

Also, Roy, I have been a user of ccleaner for at least 15 years. It is a great tool!

Wishing everybody a great day, I am off to my club's annual Swap Meet. Hopefully I will find some treasures 😁.

Dave B

Hi Doug. As per Alessandro's reply. You can only look back if you subscribe or give a one off donation. I have given one off donations and you can't go back so I think maybe I did not understand the donation aspect or the system is not working. Does anyone know how many people subscribe ? If we all paid the minimum it would be £2.50 x 1,805 = £4,512.50 a month or £54,150.00 a year. I would probably subscribe if it was just £1.00 a month. We pensioners are not made of money 😁

Three of the answers seemed completely wrong to me.
However, the correct one raised some doubts.
I don't know if it was poorly written or if I mistranslated it.

Dear Doug, thanks so much for the suggestion, but unfortunately it's wrong.
In fact, I'm surprised you didn't know, but only contributing members can go back and answer questions.
Roy can do it, while Simplesailor and I can't.
But I'm glad you're interested.
I can read past comments, but not past questions.
It's a shame, because I answered correctly.
To prove it, I should have taken a screenshot (now it's just my word), but I don't think it would have helped.
Some complaints are listened to, others are ignored.

Hi Doug how do you go back to answer questions? Is it gold membership perks?
Roy

I was going to write 'I defy anyone to get this question wrong'.
But I see that some 16% of participants DID fall for two of the obviously nonsensical AI answers🙄
Better luck next time chaps🤞
Cheers, Doug
😎

Hi Alessandro, S Sailor and Roy,
Why don't you simply go back to the date(s) you 'apparently' missed and answer the question(s)?
Yes it can be done. How do you suppose that EdW managed to find that missing question for S Sailor?😉
Cheers, Doug😎
PS Roy, I have been using CCleaner since it's inception about 20 years ago.
It was called Crap Cleaner back then😮. At about it's 3rd or 4th incarnation it suddenly became CCleaner. Not so keen on the latest version CCleaner 7 though🤔

Hi all, I must have forgotten to do yesterday's QoD! This one today implies that periscopes are used underwater. I hasd to read the question several times to understand the question. Got it right but an oddly phrased one.

Yesterday I was trying to work out why my laptop would freeze up then start up and always seemed there was something going on I did not know about.

A friend suggested I download Ccleaner and run it. Cost £14 but that is less than getting a professional opinion.
Well it took about an hour but so far laptop is running very well, like it used to.

There was so much rubbish there 256Mb of delete data and I also put all programmes not needed to sleep. They come up alright when needed.

I have rung down for full revolutions!
Roy

I seem to have discovered that if you don't know go for the answer with the most words.

Yesterday I answered the question correctly, so the green rectangle lit up.
Today I see that it's still gray.

Very irregular.

Good Morning Gang! A lucky guess as I couldn't completely remember a similar symbol over here. Although my dad explained it to me when I was a kid...maybe I was listening after all.

As for why my build postings have dropped dramatically; a winter sun room for my wife has become my "build." Now that it's weather tight I can hopefully get back down to the shop for my usual nautical work.
😉

I am getting the hang of this AI working - you don't have to worry about the ones you know and get a green mark for - you have to remember what AI says when you get a pink mark and answer accordingly next time (whether AI be right or wrong)

The wave-piercing catamaran hull is the type that the Isle of Mann ferry has.
I have seen it performing and it does look very fast 😀. I think it's called Manannan ?🤔.Never been on it though 😔.

Last Qotd-5th November, caused a bit of controversy the last time we had it on the Admiralty charts foul ground ⚡⚡😮, so I remembered it very well...

Another revision test🙄

😎

Thanks EdW. I remember now. I didn't answer it. I was going to get back to it but got side tracked by the work being done on the house..☹️

For SimpleSailor

In the context of the International Safety Management (ISM) Code, which of the following is the minimum requirement for the composition of a vessel's Safety Management System (SMS) with respect to crew competence?

Looks like I am going to need to take screen shots again. I am sure I answered yesterday's question and got it right. But the question master says I didn't answer it. A lot going with moving house and now the builders are in. Maybe I missed it but I don't think so. If some kind person could tell me what the question was, that would be nice..

Another 'Stroll down Memory Lane'😉

😎

I was about to KEEL over when I read the Question
WE BUILD BOATS DON'T WE
Rick

Hi EdW, I'm in favor of canceling the question and resubmitting a new one if possible.
Alternatively, I'd give all the green boxes, even those who received red boxes.
Further investigation is possible (perhaps including photos of written sources with bibliography), but in the meantime, the question should be contested if there are serious doubts.
In any case, the point of my comment wasn't your knowledge, which I don't question.

Alessandro how I know a bit about hull fouling is that I did research on its prevention for yachts that I crewed on. Due to my electronic engineering background, I assisted with the fitting of ultrasonic prevention systems on a few boats.

Well done EdW.
I'm impressed by the participants' knowledge across all fields, especially those who claim to only look at the internet after answering.
It's remarkable that their prior knowledge recently coincides perfectly with AI.

I think I got confused because of the dinosaur thread I was on last.
Roy

I wonder how many of our models will be in the water long enough for any fouling to occur? Normally it is just the sludge layer on the water surface that I have to clean off.

Wow Ed! All before breakfast! I have a feeling we have had that question before, or one very similar I picked Diatom because that was last time's answer, which I got right. So come on AI, get your artificial head out of your artificial fundament and give us some decent questions!

Todays answer is wrong, the first layer is due to diatom plankton, the second phase is bacterial plankton so the answer should be C as this enables D. AI bases its deductions on facts that are available and in this case it was not given all the facts.

Facts
Microfouling organisms are usually the first fouling agents to attack a submerged surface. Microorganisms are further grouped into two subsets:

Bacteria and diatoms: These are microscopic organisms that colonize a virgin surface and build a biofilm on it. Fouling diatoms are either pen-shaped or cylindrical, hence the names pennate diatoms and centric diatoms. 
Algae: They typically attach to the biofilm and exist in three forms: green algae (Chlorophyta), red algae (Rhodophyta), and brown algae (Phaeophyta).

Today's was a stinker, I went with the longest number of words

Good morning to you all, first time in ages that I've managed to get chance to do qotd and I got it right. Must go and buy a lottery ticket 😂. Have an awesome day 😀

😂 I picked the one that I have heard about (C). But I was going to pick the answer that gave the longest explanation (D), which has usually been the correct answer 😩😕🤐.

Waited 30 days to get rid of the red line and now it's appeared back at the front *#=^*!! (That's me swearing in hieroglyphics).🤣😂..

Hi Doug, I see what you mean with this one. I think that Ai is leading us into a false state of security, 🤔Then tomorrow we will get another Stinker !! Maybe something like a Colreg one.🙄 😮😮.
I also remember this one from ages ago . Another review lesson 🤔😁.

30.10.25
Heavens abovemold🙄
AI must think we are all children.
(I guess, in a way, it might be right🤔)

😎
PS just noticed I've got rid of my last duff answer😀
Until tomorrow?🤔

Out of curiosity, I translated "belaying pins" correctly because I didn't use a translator but the Amati modeling company website, which has several languages ​​for each product.
Actually, in Italian, they're called "caviglie" (ankles), meaning ankles? That is, the part of the body above the heel.

When I searched for the translation of "fife rail" and saw the photo, I understood what it was.
This question was 100% correct; I don't know if it was because it's such an easy question or because people found help online.
I studied the best way to make the "fife rail" and opted for the square C shape. Or, to be more precise, a square with one side missing, obviously seen from above.
I had to figure out and predict how many rigging would need to be attached and plan for the same number of holes for the belaying pins.
I also had to find the right size for the belaying pins based on the scale, something I had no idea about before. Even the distance between the holes can't be taken for granted.
Here are some photos.

If you explore for documentaries then try Deep History, I have only ever found 2 episodes. There must be more, it goes way back in time to explain why things are the way they are now.

Got it recorded on my set top box but not transferable.
Roy

Same here Steve👍

😎

Ok Nick about the OU coarse. I just remembered seeing the vents bubbling away with creatures swimming around, on one of the TV programmes narrated by David Attenborough, and from years ago by the Jacques Cousteau documentaries on-board the Calypso . Fantastic educational films.😀..

That was lucky! Hydrothermal vents came up on my OU science foundation course...

Well I got this question wrong. I just went straight to Oceanic Trenches because I thought the Hydro Vents were created in the trenches. Just shows how a little knowledge can be dangerous 😂

Luckily I recently read a fascinating article on how animals survive when living on hydrothermal vents.

YOOHOO😀
A duff answer finally dumped and rejoined the '97 group'.

😎

This was a guess on my part and it noticed that an answer with more words is usually correct. Was lucky today😊👍

and anyway we're in revision week.

Hello everyone.
Let's start by saying that I've gotten it wrong in the past. Today I guessed right, but I think the question is poorly phrased.

I don't like the way the question was worded, and I had trouble understanding it even the first time.
I may have simply had problems interpreting the translation, and only the answer options help a little.
In my opinion, it's always important to specify who is upwind (or downwind) versus who. In short, it's a relative, not an absolute, position.

I've made this simple argument:
Whoever is upwind (in sailing, obviously, not in motor sailing) always has a tactical advantage over whoever is maneuvering downwind.
So much so that it's a universal rule to give precedence to whoever is downwind when sailing on a collision course on identical tacks.
In a battle, maneuverability is often the most determining factor.
In theory, I also agree with Luckyduck's reasoning and consideration. This option, however, isn't considered among the four possible ones.
I don't think A, B, and C are correct, they are all highly incorrect in my opinion, including B.

Thought I had it nailed with "B." Ai can kiss me Hardy!

Same here! Last time the answer was B and D was incorrect. Now it has reversed it's self..

Sorry to say EdW, but the AI bot says that answer B is wrong, as out of all the options that was the one I picked, and I have a lovely big red mark, and another wrong answer!!!

If anyone has taken a Prince 2 exam you will have experienced multiple choice answers that are all correct but I'm the context of the question one is more correct than the others

Another memory test🙄

😎

Hi, luckyduck, I got this wrong as well but I think the clue is "in line of battle" ie they are in-line.

If the ship is circling the opponent then you are right, the guns have greater range due to the tilt of the ship.

Roy

Luckyduck, Yes you are correct but that is not offered as a choice in this case, B and D are both correct as well but D is the better choice.