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Old 12-29-07, 09:58 AM   #1
von Zelda
Stowaway
 
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Default 30-kilometer ring around tugboat contact?

Observed a tugboat just off the coast of the Netherlands. When I clicked on the contact on the Navigation map, it showed a broken circle around the contact with a 30-kilometer radius.

What would be the reason for a 30-kilometer ring around this type of contact? Previous discussion about rings around contacts indicated ASDIC, visual & hyrophone distances but I do not understand why there would be a 30-kilometer ring around a tugboat.

Any ideas? By the way, I'm running the new GWX 2.0 which GREAT, love it.
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