There is usually (always?) some kind of signage. There may be buoy markers
within the water body, but other times there may not be.

On Sat, 9 Sept 2023 at 17:58, Frederik Ramm <[email protected]> wrote:

> Hi,
>
> how are speed zones designated on the ground, especially where they
> apply to parts of a larger water area?
>
> Bye
> Frederik
>
> On 9/9/23 08:20, Andrew Harvey wrote:
> > I'm proposing to import NSW Maritime Speed Zones data into OSM, as
> > sourced from Transport for NSW.
> >
> > The proposal is at
> >
> https://wiki.openstreetmap.org/wiki/Import/Catalogue/NSW_Maritime_Speed_Zones
> <
> https://wiki.openstreetmap.org/wiki/Import/Catalogue/NSW_Maritime_Speed_Zones
> >
> >
> > This would be a manual import.
> >
> > _______________________________________________
> > Imports mailing list
> > [email protected]
> > https://lists.openstreetmap.org/listinfo/imports
>
> --
> Frederik Ramm  ##  eMail [email protected]  ##  N49°00'09" E008°23'33"
>
> _______________________________________________
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> https://lists.openstreetmap.org/listinfo/imports
>
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