If by "submarine" you mean an icon that looks like a submarine's Periscope sticking out of the water, this is likely the coolant temperature warning light (it's supposed to be an old glass tube thermometer dipped into the water). This can mean your engine is getting too hot and needs to cool down, or you run the risk of causing severe damage. This can sometimes happen if driving in very hot weather and putting a lot of load on the engine.
Check if the coolant level is low. If you do need to add more coolant to the engine, drive it a round for a bit afterward and recheck the coolant level. If it is low again, you have a coolant leak which needs to get fixed PRONTO.
It is important that you do NOT open the coolant cap while the engine is still hot as heated coolant can often be under a lot of pressure and can spray very hot liquid everywhere, which can (and probably will) burn you if the cap itself doesn't.
If the coolant level is fine, and your engine uses an electric fan to draw air through the radiator, make sure the fan is going when the engine is running.
If this light comes on frequently, and the coolant level and radiator fan are both fine, you should take it in for service ASAP as something else is causing the engine to run hotter than it should.
what is submarine cable buoy light and shape & what is submarine emergency buoy light and shape
Depends on the type of submarine...
A submarine best fits the description.
You light it inside an airtight submarine.
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Unterseebooten.... German for Submarine.
Anti-Submarine Warfare.
The word submarine can be a noun or an adjective.(Note that as an adjective it means underwater, not the type of submersible ship.)
A submarine.. I don't think that's a very funny joke. Is it a submarine?
That would be the result of a submarine volcano. Pillow lava is a common type of lava that submarine volcanoes produce.
Nuclear submarine is a type of transportation. It begins with N.
submarine volcano xoxox babes