What do these red line thingies mean?

[johnalison]

If it's any consolation, any concern or embarrassment here will pale into insignificance the first (or Nth) time you run aground/cock-up a berthing/ drop your mobile-hat-wife in the drink/ run the engine without cooling water, or any of the innumerable ways that Poseidon has of keeping you in your place.

 

[Daydream believer]

It took me a long time to lose my fear of asking stupid questions. But it gradually dawned on me that if I didn't ask, I would remain in actual ignorance, which is much worse than only being thought ignorant.

I wonder, when you ask some of these so called "stupid " questions, you realise how many do not actually know the answer either. You are not always as alone as you think you are. You have just had the sense to ask.
If a poll had been set with no googling allowed, the OP may not have been in such a minority when asking the question about the shaded areas.
If you asked me how they are displayed on an old black & white Admiralty chart, I would not immediately recall how it is shaded, without looking. I would then spot it straight away.

I would possibly say it is the brown one, next to the blue ball, at the far end, by the pink

 

[Praxinoscope]

If the OP can ignore the petty sniping and hubris he’ll find many helpful people on these forums. Just filter out the dross (you’ll soon discover which is which!)

If you want to know what a symbol on a chart is, the goto booklet is Chart 5011. (Strangely called a chart although it’s a booklet.)

I’ve just reached behind me as I sit in our boat and pulled mine off the bookshelf.

View attachment 157811

It’s a reference for every symbol on all admiralty charts. The symbols are pretty common on all charting from whatever source for obvious reasons.

Keep asking questions. There’s no such thing as a stupid question.

I keep a copy on board, as one day I am sure I will find a symbol I don't recognise and could well regret assuming it wasn't important.

 

[steveeasy]

It’s available online https://sd6ea49279f075268.jimcontent.com/download/version/1625067269/module/8048499762/name/Chart Symbols Admiralty Chart 5011.pdf

Just what I need on board. Thanks to the OP for asking the question and indeed the attachment provided.
Steveeasy

 

[penberth3]

I apologise for asking. I couldn’t see it in my books and I didn’t know what to search for. I thought asking would be okay I didn’t realise id be a problem

Don't apologise!!! Most maps have a legend with all the symbols, so it's easy. Sea charts don't, you have to know where to look, so you ask. It isn't a problem.

 

[penberth3]

When someone needs to ask here about the meaning of symbols on a chart there is a major problem.

Chart interpretation should be, is, simple.

If you cannot 'read' a chart, what else are you missing?

You cannot rely on experts, even old farts nor wise cracks, from a forum every time

Jonathan

edit

I was asked yesterday about the meaning of 'true' in 'true north'.....




You cannot make these things up.

OK, I'll bite. Can you explain "true north", why it's called that, and why it's "truer" than the other north points?

 

[Babylon]

See pages 128-9 and 158-9:

https://www.amazon.co.uk/RYA-Navigation-Handbook-Tim-Bartlett/dp/090150193X

Just £1.56... but you get better arguments here...

 

[Black Sheep]

You used to get even better arguments here when Tim Bartlett himself was still a member....

 

[shan]

Am I upset at the comments I have engendered, not a bit.

I've apparently had my dopamine hit, enough is enough - and fortunately I'm not dependent.

Jonathan

No, you're just behaving like a pompous know it all.

 

[Babylon]

These two superbly-illustrated RYA handbooks will also acquaint you with a ton of knowledge and understanding... but much of it will only properly sink in once you've got some time afloat:

RYA Day Skipper Theory

RYA Day Skipper Practical Course Notes

 

[Black Sheep]

Am I right in assuming that the OP is using these 'charts' as his sole means of navigation.

[snip]

I assume these are the OP's basis for navigation

No. The OP isn't currently navigating at all. From post 15: "I don’t plan on sailing for another year. I’m just very new to this and couldn’t find it. I’m probably missing a LOT. Just trying to learn".

The guy's just a learner, trying to learn.

 

[Whaup367]

OK, I'll bite. Can you explain "true north", why it's called that, and why it's "truer" than the other north points?

True north is the direction to the north pole.
Magnetic north is the direction a compass points (the location of the magnetic north pole varies, as does the orientation of the magnetic field in many areas)
Grid north is the orientation of the vertical lines on a map or chart. It's not practical to have all of these align perfectly to true north because of the compromises necessary to represent a curved area on a flat sheet.

Magnetic and grid are approximations, hence "true".

 

[Tamar]

Sorry folks

I just think there are some basic things you should know and that asking about those basic things might mean you are embarking on a pastime that needs a bit more commitment.

Jonathan

Frankly I'd rather people did not ask questions about anchors - as that might indicate they know what they are doing. .

You would be the last person I would ask for advice. I have come across skippers like you in the past, I was scared to ask questions after a while because of the response I was getting. I came to the conclusion that this particular skipper didn't know a lot.
To the op lovely day. Feel free to ask any questions. There is no such thing as a silly question

 

[john_morris_uk]

True north is the direction to the north pole.
Magnetic north is the direction a compass points (the location of the magnetic north pole varies, as does the orientation of the magnetic field in many areas)
Grid north is the orientation of the vertical lines on a map or chart. It's not practical to have all of these align perfectly to true north because of the compromises necessary to represent a curved area on a flat sheet.

Magnetic and grid are approximations, hence "true".

Unfortunately it’s a bit more complex than that.
I’ll allow others to enlarge on the various datum’s that we use.
We can’t even say that N is the point where the earths axis spins around as there’s also the whole precession of the earths axis to consider.

For practical navigation these esoteric things can be ignored. True is what the chart shows as true (and let the cartographer worry about which way the lines are printed). Magnetic N is where your compass points etc.

Perhaps this ought to be another thread.

 

[Mister E]

Someone who is thinking of taking up sailing asks a simple question about charts and gets told they should not be thinking of sailing.
Bloody hell someone needs to stop digging.

 

[Frank Holden]

Precisely why should I be encouraging anyone? I don't derive any benefit from my posts and frankly I would prefer that people knew basic rules of seamanship. I would prefer people told me how to anchor better.

I prefer people who invest a bit of time in a pastime where they will be responsible for the lives of others. There are many things that are difficult to research (there is no right and wrong) - but Traffic Separation Schemes (and marking of same) are not one of them.

One lesson the OP may have learnt is that he has some learning to do (and if this is a hard way to find out - tough - spoon feeding does not work when the chips are down). If he is discouraged - he needs to know he is responsible and ignorance is NOT a defence.

Google is your friend

Jonathan

For heaven's sake - were you born all knowing? Oh OK . Lucky you.
In my experience the average Australian yachtsman wouldn't know a TSS ( rare as hens' teeth in the antipodes) if it was up them ringing a bell.

 

[steveeasy]

For heaven's sake - were you born all knowing? Oh OK . Lucky you.
In my experience the average Australian yachtsman wouldn't know a TSS ( rare as hens' teeth in the antipodes) if it was up them ringing a bell.

Were you borne all knowing. I do like that. Something some people take far too for granted. It takes either a lot of money or a lot of time or both to acquire the Knowledge some take for granted. Where ever you are in your journey your be learning something new which is why sailing can be so fascinating and rewarding.
Steveeasy

 

[Roberto]

A question too
What is this?



The official document shows interruptions in the separation zones only for crossings

 

[TwoFish]

A question too
What is this?

View attachment 157850

A lower level of zoom* revealed the 'common sense' visual explanation

* taken from Navionics ChartViewer



I confess I had to look up the official designation though, being (M 14) "Limit of restricted routeing measure (e.g. Inshore Traffic Zone, Area to be Avoided)". Similar is shown around the (M) 24 Precationary Area / 29.1 Area To Be Avoided examples in the explanatory image you have posted.

 

[capnsensible]

If the OP can ignore the petty sniping and hubris he’ll find many helpful people on these forums. Just filter out the dross (you’ll soon discover which is which!)

If you want to know what a symbol on a chart is, the goto booklet is Chart 5011. (Strangely called a chart although it’s a booklet.)

I’ve just reached behind me as I sit in our boat and pulled mine off the bookshelf.

View attachment 157811

It’s a reference for every symbol on all admiralty charts. The symbols are pretty common on all charting from whatever source for obvious reasons.

Keep asking questions. There’s no such thing as a stupid question.

Eek. I can actually remember when it was a chart before it became a book!!!! Nooo.....