Is there a standard distance Cardinal Marks

> 10 years ago
Reply
Register to post, see what you've read, and subscribe to topics.
DeanSailing
DeanSailing
20 posts
20 posts
28 Dec 2014 2:30am
Hello, I have recently taken up sailing crewing with an experienced sailor. Today I asked what I thought was a sensible question... I asked if there is a standard distance recommended to ensure you don't run into whatever the marker is warning you about. IE one Northern Marker standing alone means keep to the north of it... obviously at some stage it is safe to head south so I wanted to know if there is a standard distance at which point it is safe or some sort of indicator... when I asked the question I was made to feel foolish, he said just keep north of the mark, I said I know that but if I want to head south at some stage I obviously can't do it immediately so there must be some sort of guideline, his response was to ask if I had been drinking and the best answer he could give me was to use common sense! He said how do they know how big a sand bar is? One day it could be 10 feet the next 30... He was getting annoyed with me which pissed me off and I really don't want to go sailing with him again. My thinking is that if there was a large stretch of unsafe waters they would probably have more than one marker and so there would have to be a standard distance at which a second marker would be required... I have dabbled in a lot of things, I had a students pilot's licence many years ago, scuba dived a little, paragliding, dabbled in engineering, built a food van... etc, they all have exact standards to follow or buffers etc, ie a passenger is considered one person in a plane but 75kgs is the standard weight (I think - it's been a while), so I would expect the same applies to the boating industry and although common sense should always be applied can anyone give me their understanding on this matter? Many Thanks.
Charriot
Charriot
QLD
880 posts
QLD, 880 posts
28 Dec 2014 6:07am
Marine navigation is working with charts. Chart tells you why navigation marks are used
on the first place. The most obstacles are not man made, different rules apply.
There is no specific standart as you expect on the road.
brizzydave
brizzydave
406 posts
406 posts
28 Dec 2014 9:25am
Next time you're at the helm, drive the boat a few meters away from the mark and see what he says :-). My other world is filled with instructors. I/we judge them all the time. Most of them have no natural teaching talent, so it's difficult to learn etc. Out of all the ones I know, only one has the special gift to teach and teach well. But he's also a school teacher in real life. "The only stupid question is the one you don't ask" as they say. Lots of empathy required to teach. It's aggravating when something like that happens.
spongeblob
spongeblob
NSW
218 posts
NSW, 218 posts
28 Dec 2014 12:43pm

DeanSailing, The question you asked is a sensible one, Ive wondered the same thing myself.
BrizzyD, "Next time you're at the helm, drive the boat a few meters away from the mark and see what he says :-)"...That's so funny and you all over.
LooseChange
LooseChange
NSW
2140 posts
NSW, 2140 posts
28 Dec 2014 12:46pm
The way he responded to your question shows he has no idea himself, he would have come out looking a lot better had he taken the time to explain why the mark is there. Charriot explained it well by stating that charts are what you navigate with. The marker is there so that you have a good look at your charts so you can see what obstacle to avoid. By looking at charts it is implied that you will be looking at an official paper chart rather than a electronic chart on a plotter. Had Vestas Wind bothered to look at a paper chart rather than rely on the plotter chart they may have taken more notice of the imminent danger they were heading towards on the Cargados Carajos Shoals.
southace
southace
SA
4803 posts
SA, 4803 posts
28 Dec 2014 12:17pm
As mentioned above Cardinal marks are combined with charts of the area.

A good skipper will see the mark and then check the chart and put in a allowance depending on the draft of the vessel.

It depends on the amount of shipping and maritime survoyers on how often accurate these marks are placed.

Obvosily it's a big job shifting,dredging and changing the charts all the time due to shifting sand banks....etc but it does get done occasionally This is why you should get the updates for your charts if your a master mariner.

If your in a fast low draft planing vessel it would almost be safe to say you could get as close as 50 meters but without knowing the depth there would be some slight risk involved. Good question though it's not questioned often and I can understand a slight conflict could arise if someone was questioning this subject!
southace
southace
SA
4803 posts
SA, 4803 posts
28 Dec 2014 12:25pm
Im not having a posting battle with you Loose change! Sorry about that....hmmm I should just go sailing! Soon!
southace
southace
SA
4803 posts
SA, 4803 posts
28 Dec 2014 12:34pm
But now that you brought an incident up involving paper/electronic charts I have to disagree to a certain point!.
The paper charts are only as good as they are if updated. I would say digital updated electronic charts would be more accurate. On this topic how do you update electronic charts? Do navionics up date? I'm sure you should be able to Awnser this loose change as you seem the IT goro!
DeanSailing
DeanSailing
20 posts
20 posts
28 Dec 2014 10:18am
DeanSailing said..
Hello, I have recently taken up sailing crewing with an experienced sailor. Today I asked what I thought was a sensible question... I asked if there is a standard distance recommended to ensure you don't run into whatever the marker is warning you about. IE one Northern Marker standing alone means keep to the north of it... obviously at some stage it is safe to head south so I wanted to know if there is a standard distance at which point it is safe or some sort of indicator... when I asked the question I was made to feel foolish, he said just keep north of the mark, I said I know that but if I want to head south at some stage I obviously can't do it immediately so there must be some sort of guideline, his response was to ask if I had been drinking and the best answer he could give me was to use common sense! He said how do they know how big a sand bar is? One day it could be 10 feet the next 30... He was getting annoyed with me which pissed me off and I really don't want to go sailing with him again. My thinking is that if there was a large stretch of unsafe waters they would probably have more than one marker and so there would have to be a standard distance at which a second marker would be required... I have dabbled in a lot of things, I had a students pilot's licence many years ago, scuba dived a little, paragliding, dabbled in engineering, built a food van... etc, they all have exact standards to follow or buffers etc, ie a passenger is considered one person in a plane but 75kgs is the standard weight (I think - it's been a while), so I would expect the same applies to the boating industry and although common sense should always be applied can anyone give me their understanding on this matter? Many Thanks.


Many thanks to everyone who responded and I only wish my 'instructor' answered in that way - that makes perfect sense... the marker is a warning to stay on a particular side of a hazard that is documented electronically or on a paper chart and the person in charge (or someone appointed) has a responsibility to refer to that document in order to know when it's safe to pass. I knew there would be some sort of standard practice to follow. Thanks again and I hope everyone enjoys their Christmas and summer. Dean.
LooseChange
LooseChange
NSW
2140 posts
NSW, 2140 posts
28 Dec 2014 1:22pm
southace said..
But now that you brought an incident up involving paper/electronic charts I have to disagree to a certain point!.
The paper charts are only as good as they are if updated. I would say digital updated electronic charts would be more accurate. On this topic how do you update electronic charts? Do navionics up date? I'm sure you should be able to Awnser this loose change as you seem the IT goro!


I agree that any chart is only as good as its last update and given that both paper and electronic charts are expensive to buy and that combined with that most sailors are as tight as a fishes and are therefore loath to spend the money.
The main problems I see with electronic charts is the level of detail varies at different zoom ranges whereas a paper chart only has one layer and the danger is there to see.

Beyond a certain zoom level an electronic chart becomes dangerous because by zooming in, it can increase the chart scale beyond what can be supported by the source data. The constant and automatic update of the vessel’s position on the chart display can give the navigator a false sense of security, causing him to rely on the accuracy of a chart when the source data from which the chart was compiled cannot support the scale of the chart displayed.

The need to update any electronic chart is possibly based more on commercial decisions. For instance, a company is likely to a update a chart more often if the area of chart coverage is in a high traffic area and they are going to sell more charts of that area, than say maybe a more obscure location where only a few ships venture and there is possibly no return on the investment of updating a chart.
LooseChange
LooseChange
NSW
2140 posts
NSW, 2140 posts
28 Dec 2014 1:24pm
DeanSailing said..

Many thanks to everyone who responded and I only wish my 'instructor' answered in that way - that makes perfect sense... the marker is a warning to stay on a particular side of a hazard that is documented electronically or on a paper chart and the person in charge (or someone appointed) has a responsibility to refer to that document in order to know when it's safe to pass. I knew there would be some sort of standard practice to follow. Thanks again and I hope everyone enjoys their Christmas and summer. Dean.


Dean, go and enjoy your sailing and don't be put off by what happened, keep sailing with that skipper and if you have any other questions, don't ask him but rather someone you might feel more comfortable with.
southace
southace
SA
4803 posts
SA, 4803 posts
28 Dec 2014 12:56pm
Yes mate and like a special Mark its a mark of cation. Some times a special Mark might be right in the middle of a wreck it's just a guide to keep clear and refer to the chart.

Almost the same as Padi its a guide stating refer to the dive plan and take caution.
southace
southace
SA
4803 posts
SA, 4803 posts
28 Dec 2014 12:58pm
LooseChange said..

DeanSailing said..

Many thanks to everyone who responded and I only wish my 'instructor' answered in that way - that makes perfect sense... the marker is a warning to stay on a particular side of a hazard that is documented electronically or on a paper chart and the person in charge (or someone appointed) has a responsibility to refer to that document in order to know when it's safe to pass. I knew there would be some sort of standard practice to follow. Thanks again and I hope everyone enjoys their Christmas and summer. Dean.



Dean, go and enjoy your sailing and don't be put off by what happened, keep sailing with that skipper and if you have any other questions, don't ask him but rather someone you might feel more comfortable with.


I was going to say that!
LooseChange
LooseChange
NSW
2140 posts
NSW, 2140 posts
28 Dec 2014 1:41pm
southace said..

LooseChange said..


DeanSailing said..

Many thanks to everyone who responded and I only wish my 'instructor' answered in that way - that makes perfect sense... the marker is a warning to stay on a particular side of a hazard that is documented electronically or on a paper chart and the person in charge (or someone appointed) has a responsibility to refer to that document in order to know when it's safe to pass. I knew there would be some sort of standard practice to follow. Thanks again and I hope everyone enjoys their Christmas and summer. Dean.




Dean, go and enjoy your sailing and don't be put off by what happened, keep sailing with that skipper and if you have any other questions, don't ask him but rather someone you might feel more comfortable with.



I was going to say that!


You can still say it ..... just as a bit of reinforcement
southace
southace
SA
4803 posts
SA, 4803 posts
28 Dec 2014 1:17pm
I think he's over come that anyways by the last thank you post! I wont reinforce it now!
It just shows that we never stop learning and there's never a reason not to question something you would like to learn!

Subsonic
Subsonic
WA
3419 posts
WA, 3419 posts
28 Dec 2014 12:07pm
DeanSailing said..
Hello, I have recently taken up sailing crewing with an experienced sailor. Today I asked what I thought was a sensible question... I asked if there is a standard distance recommended to ensure you don't run into whatever the marker is warning you about. IE one Northern Marker standing alone means keep to the north of it... obviously at some stage it is safe to head south so I wanted to know if there is a standard distance at which point it is safe or some sort of indicator... when I asked the question I was made to feel foolish, he said just keep north of the mark, I said I know that but if I want to head south at some stage I obviously can't do it immediately so there must be some sort of guideline, his response was to ask if I had been drinking and the best answer he could give me was to use common sense! He said how do they know how big a sand bar is? One day it could be 10 feet the next 30... He was getting annoyed with me which pissed me off and I really don't want to go sailing with him again. My thinking is that if there was a large stretch of unsafe waters they would probably have more than one marker and so there would have to be a standard distance at which a second marker would be required... I have dabbled in a lot of things, I had a students pilot's licence many years ago, scuba dived a little, paragliding, dabbled in engineering, built a food van... etc, they all have exact standards to follow or buffers etc, ie a passenger is considered one person in a plane but 75kgs is the standard weight (I think - it's been a while), so I would expect the same applies to the boating industry and although common sense should always be applied can anyone give me their understanding on this matter? Many Thanks.



Further to what everyone has already said Dean, generally if theres one cardinal mark sitting by itself, the danger is either fairly obvious or theres plenty of further guidance in the area on where to go.. eg a channel marked with far spaced Port/Starboard markers, with a reef sitting right next to it. theyll stick a cardinal on the corner of the reef to let you know there is an immediate danger, so as you dont drift too close to it.

Generally if there's a danger that isnt obvious, sitting out in open water, theyll stick more cardinal marks around it so you can see the outer limits of the danger.
Charriot
Charriot
QLD
880 posts
QLD, 880 posts
28 Dec 2014 2:59pm
How easy is navigation, you see buoys and markers.
Here around Keppels we have a dozen islands, everyone of them
has a dangerous rocky reef. Not a single buoy or marker.
But white buoys ..marine park..no anchorage..plenty.


southace
southace
SA
4803 posts
SA, 4803 posts
28 Dec 2014 5:02pm
Charriot said..
How easy is navigation, you see buoys and markers.
Here around Keppels we have a dozen islands, everyone of them
has a dangerous rocky reef. Not a single buoy or marker.
But white buoys ..marine park..no anchorage..plenty.




That's cause the Kepples don't create income and pilots don't spend the money on non profitable Islands that don't cause navigational issues apart from the occasional lost hippy sailor.!
Charriot
Charriot
QLD
880 posts
QLD, 880 posts
28 Dec 2014 4:50pm
Your knowledge of our local quiet area is scary.
"shark" just lost second application for Casino on GKI.
Until a licence is granted, we can enjoy place full of hippy sailors.
well, thanks to them we at least ones a week nice rescue.
southace
southace
SA
4803 posts
SA, 4803 posts
28 Dec 2014 5:37pm
Charriot said..
Your knowledge of our local quiet area is scary.
"shark" just lost second application for Casino on GKI.
Until a licence is granted, we can enjoy place full of hippy sailors.
well, thanks to them we at least ones a week nice rescue.


"Shark" will be just as popular as the xxxx gold island! Is it somewhere near that dinsourour golf resort? Haha
Bananabender
Bananabender
QLD
1610 posts
QLD, 1610 posts
30 Dec 2014 8:33pm
G'Day DeanSailing, I'm new to site ,first post actually, but did a lot of ocean and around the cans racing.
To get the most fun out of crewing ,sailing,I suggest you may like to get hold of a book by Jeff Toghill called Coastal Navigation.
Its cheap,easy to read and explains the basics.
These days everyone relies on GPS etc.etc . and I would not be surprised if a lot of skippers had no idea how to manually navigate or read a chart.
southace
southace
SA
4803 posts
SA, 4803 posts
30 Dec 2014 9:18pm
Gday and welcome banana bender.... a chart requires a Lat and long to navigate if no GPS is present you will need to use a sextant or use compass and estimations to find your position hense the reason we use GPS. Jeff Toghill Coastal navigation is only mud maps and guides but I do belive its a good read and educational.
Bananabender
Bananabender
QLD
1610 posts
QLD, 1610 posts
30 Dec 2014 9:26pm
G'day southace,
Thanks for the welcome. I was not suggesting thatDeanSailing would be able to plot a course or get a fix and am sorry if I gave that impression.
I just feel a little knowledge such as knowledge of markers and how to read a chart makes things more interesting. I accept that if all the batteries go flat everyone gets lost these days and am amazed at the directories you can buy at the newsagent to sail around the local bays etc.
I was taught coastal and celestial navigation by a submariner at RMIT in melbourne and ocean raced when technology was banned ,excepting radio but I still find the toghill book a good simple refresher

I
nswsailor
nswsailor
NSW
1458 posts
NSW, 1458 posts
30 Dec 2014 11:51pm
southace said..

That's cause the Kepples don't create income and pilots don't spend the money on non profitable Islands that don't cause navigational issues apart from the occasional lost hippy sailor.!


Now now Southace, I may come from that era and I may have had the appearance of a hippy once, BUT I've never been lost at sea...

Except when I've been flying [navigating] in helos on bush fires!!!!

PS expect to be in the Keppel's sometime towards the end of April 2015.
Please Register, or first...
Topics Subscribe Reply