Weird french boat sign?

[haraldmartin]

Hey, some couple of years ago i've found this unknown french sign on Utvorda, Norway. Anybody have a clue if it belong to a boat from ww2? Found it some meters from the shore

Lenght: 25 cm
Width: 15 cm

 

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[Lafitte Deux]

Here's a rough (and I mean rough) translation

opening triggers alarm machine ?beware? of the ventilation

Hope that helps

 

[nhbenz]

L'arret is "stop". I get, that the alarm will sound and ventilation will stop. I presume that it vents to somewhere that it ought not to if the Co2 level gets too high. I would think this type of sign could be located in any type of power plant (except hydro I guess) or many industrial applications. What is it made of? I'm not sure I think it would have weathered so well since WW2.

 

[taz42o]

I think it has to do with stopping the ventilation and filling the room with co2 to put out fires. Such as in the engine room of a ship.


Like these...

http://sell.lulusoso.com/selling-leads/632654/FM-200-Fire-extinguishing-System.html

 

[haraldmartin]

Yeah, i don't know, but thanks for the help!