30-kilometer ring around tugboat contact?

12-29-07, 09:58 AM

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.

12-29-07, 09:58 AM	#1
von Zelda Stowaway Posts: n/a Downloads: Uploads:	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.