Help old harpoon?

Thanks for your time any thought on this mark regards Joe

 

That's strange, the mark is a Civil Defense symbol.

https://www.google.com/search?q="ci...ZMQ_AUIBygC#hl=en&tbm=isch&q="civil+defense"+

 

Wow this is very nice!

 

I'm thinking it is not a harpoon; it appears the trailing edge of the triangular point is sharp, which would not usually be the case with a harpoon, I'm guessing.
Some kind of brush-cutting tool?
How long is the handle?

 

You are right about that, Steve, thanks.

The cutting edge looks small and hooked. If it once had a long handle, could it have been used to cut line from a boat?

 

It has a 7' handle so some type of cutting tool makes sense, thank you for your thoughts and time regards Joe.

 

Maybe some kind of pike pole, like the ones firefighters use.