It is sw coast of South America.

[link to www.ndbc.noaa.gov]

(It's an arrow pointed right at it underwater)

set:

mouse cursor 43.56 s, 76.47 w

zoom in at scale on legend to 20 mi/50 km

This section of seabed of importance.

(you can measure entire length of arrow if you wish)



At the link:

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