It looks like a light marking the entrance to a canal, where the navigatable 
waterway leaves the natural river and enters into an artifical canal. Two of 
them marking the left hand edge of the canal. Further up the canal on both 
banks are opening_to_righ, opening_to_left and keep_to_mid-river notice boards.

I have temporarily tagged it as a light with triangular topmark

Aun Johnsen

On 22. juni 2013, at 02:45, Malcolm Herring <malcolm.herr...@btinternet.com> 
wrote:

> On 22/06/2013 00:46, Aun Yngve Johnsen wrote:
>> On a canal head in Rio TietĂȘ there is a red light with a white triangle with 
>> red band board, how do I tag that?
> 
> Do you know what its function is?
> 
> 
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