Meaning of a flashing Yellow

[MarkV]

In a recent PBO quiz a flashing yellow was said to indicate a submarine, I know it also indicates a hovercraft in non displacement mode and I am sure I have seen a highspeed catamaran showing the same. My question is this, since I have not seen all of the various uses of this light signal in the usual array of text books, who holds the definitive list of agreed signals? Is it available on the internet? Where might I gat a copy? Also, does any one know of a decent index of lighting signals, i.e. "if I see this set of lights it meens this or that or the other?" rather than the usual way they are presented which is "ships of such a size or type show this kind of light." I guess the same questions could be asked of sound signals, and flag signals.

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[Robin]

There is a French fishing boat in the shipping lanes east of Ushant that uses one too!

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[alant]

Rule 23 (b) lays down that, in addition to the normal lights and shapes carried by a power driven vessel of the same length, an air-cushion vessel when operating in the non-displacement mode shall exhibit an all-round flashibg yellow light. (120/minute).
Also all the IOW Ferries exhibit an all round flashing yellow light, when actually entering & leaving Cowes. Some of these will be air-cushion (now only Portsmouth - Ryde) & previously semi displacement hydrofoils, but now displacement & catamarans (still displacement due to Cowes speed restriction).
Can't find anything specific about submarines, but think this is correct. I wonder if the light goes off underwater? Does anyone check (like a fridge).

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[tcm]

UK subs use constant flashing yellow, US subs use group fl(2), i seem to remember?

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[MainlySteam]

<<<Does anyone check (like a fridge). >>>

I think like a fridge the light only comes on if you open the door under water.

John

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[vyv_cox]

Dredgers and lighters discharging spoil off the Dutch coast commonly display yellow flashing lights. I've never found any justification in ColRegs but it definitely draws the attention!

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[jimi]

Think the fast ferries use the flashing yellow under local regs rather than coll regs.

<hr width=100% size=1>.. its life but not as we know it ..

 

[qsiv]

Now we're into metaphysics. How do we know that falling trees make a sound when there is no one (or no sound receiving equipment) there to observe. Maybe the trees only make a sound to attract our attention, and dont bother when there is no audience.

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[MainlySteam]

Or that one is not really a butterfly just dreaming that one is a man?

Am looking after some power boat new builds with yellow strobes 'cause they are High Speed Craft - however I have found that white strobes don't work, my one on my mast doesn't make me go any faster at all when I turn it on.

John

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[tcm]

i disagree,

If the trees had emotions such they made a noise to attract our attention but otherwise didn't bother, then surely some trees would commit suicide, and even more others would accidentally forget to make a racket. So there would be lots of reports of trees silently falling over. Also, some trees would probably make a right scene and create far too much noise, tottering for ages before falling and then they'd roll about on the ground melodramatically.

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[Jools_of_Top_Cat]

And not forgetting that all the other trees would laugh and applaud the tree that has just fallen.

<hr width=100% size=1>Julian

<A target="_blank" HREF=http://www.topcatsail.co.uk/movies.html>Dolphin Movie From Top Cat</A>

 

[maxxi]

Unmanned fishing machines in the Irish Sea

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[Talbot]

<<How do we know that falling trees make a sound when there is no one (or no sound receiving equipment) there to observe>> - well obviously, as you specify "trees" they must make sound as a means of talking from tree to tree /forums/images/icons/crazy.gif

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[jimi]

Falling Trees

Well if there's no one there to observe then they do'nt exist and therefore can only scream in a non-existential twenty third dimension!

<hr width=100% size=1>.. its life but not as we know it ..

 

[bumblefish]

If a man is alone in the forest, is he still wrong?

<hr width=100% size=1>...If you can find the simple solution to a complex problem, you've got it wrong!.........

 

[Peppermint]

He could be "engaged in purse seining" whatever that is. They seem to go round in circles with a flashing yellow in addition to normal trawling lights.

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[KipH]

I think a yellow 120 flash/min is a hovercraft. Around 90 flash/min is a submarine, and two yellow lights flashing alternately is a purse seiner. I seem to remember I got this from the Macmillan Reeds Yachtsmans Handbook (or similar name). It's a bit like an almanac but without all the tidal info. Costs about £30.

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[oldgit]

Re:Sorry only 11 dimensions

NM

<hr width=100% size=1>If it aint broke fix it till it is.

 

[qsiv]

As my eldest (10) pointed out - what makes you think you are part of your own dream, you might be part of some one elses dream?

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[MainlySteam]

Clearly a philosopher in the making.

Can he explain what it is that trees sigh about?

John

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