Dangerous/Non Dangerous wrecks?

MystyBlue2

MystyBlue2

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I'm a little confused as to what makes wrecks dangerous?

Im looking to fish a couple of wrecks about 2.5NM offshore and there are 2 distinct differences on Navionics.

They are both sounding 25-35M deep and constantly submerged but if i click the info button when over the wreck one is "Dangerous" and the other isn't, With no brief explanation as to why.

What and who deems these wrecks dangerous or non dangerous and are they a danger to boaters or just divers and the like?

If they where a bit closer in and a section of a mast was visible over low tide then i could understand but i cant see why some wrecks are dangerous and some are not?

Any suggestions?
 
john0740 said:
My understanding; 'dangerous' in this context means considered dangerous to surface navigation.
Marked as dangerous if the depth is thought to be 28m or less. IHO symbol K28.
Click to expand...
So there is a possibility of my keel or prop maybe hitting a mast that is just under the surface?
 
Dan208 said:
I'm a little confused as to what makes wrecks dangerous?

Im looking to fish a couple of wrecks about 2.5NM offshore and there are 2 distinct differences on Navionics.

They are both sounding 25-35M deep and constantly submerged but if i click the info button when over the wreck one is "Dangerous" and the other isn't, With no brief explanation as to why.

What and who deems these wrecks dangerous or non dangerous and are they a danger to boaters or just divers and the like?

If they where a bit closer in and a section of a mast was visible over low tide then i could understand but i cant see why some wrecks are dangerous and some are not?

Any suggestions?
Click to expand...
Has one of them got a horizontal line under it? If so its been swept by a wire drag to even out the pointy bits
 
No they dont have a line under.

It's a wreck symbol with a dotted bubble around it.

If i go to info it says...

Dangerous wreck - Depth sounding 25-28M Always submerged.

Thats it.
 
I wonder if it would be worth slowly drifting over them and getting a picture of the wreck over high water with my sounder to see if it poses a threat to my boat? And what type of wreck it is...hmmm ?
 
Dan208 said:
No they dont have a line under.

It's a wreck symbol with a dotted bubble around it.

If i go to info it says...

Dangerous wreck - Depth sounding 25-28M Always submerged.

Thats it.
Click to expand...
Just dug out my old diving notes ;-) If its a fishbone with a dotted line around it and no text it means it remains submerged at all times but is a potential navigation hazard because it hasnt been properly inspected by a diver or using a wire drag. In practice at that depth in the UK I would be surprised if there was anything remotely near the surface anymore unless its a recent wreck. Most of the WW1 and WW2 stuff Ive dived in the South West didnt stick up more than 5 metres at that depth. Float over it at high tide if in any doubt!
 
That is typical for around where i am and only declared "safe" or no dotted line around it once its 50M depth or more
 

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Think i will set a drift either upwind or uptide and slowly drift over it and get a decent picture of it with the sounder. Think thats the only way to confirm if its dangerous to me or not.

Cheers folks ?
 
Dan208 said:
No they dont have a line under.

It's a wreck symbol with a dotted bubble around it.

If i go to info it says...

Dangerous wreck - Depth sounding 25-28M Always submerged.

Thats it.
Click to expand...

Dangerous to trawlers maybe. I doubt that pleasure craft will have anything on them that will reach deep enough, but it's best to avoid the area if possible. Of course, the depth given will be at MHWS. Given the lowest astronomical tide, combined with a swell, actual depths will vary.
 
Where's the [smug] smilie when you need it? I draw change from a metre, so if it isn't exposed at chart datum, it's only for a few hours, one or two days a month day it'll pose a risk to me :) I've even taken a short cut over the submarine barrier of Southsea, though I have to admit, I didn't put my full weight down until we were over it, even with a metre and half of tide
 
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