[kstar]

Looks like SCI.

http://www.scisland.org/schedules/usageGoogle/usageGoogle.php

and

http://www.scisland.org/schedules/schedules.php

A temporary safety zone (TSZ) will be established in Northwest Harbor
on 6 and 7 April 2009 from 0700 to 1300. The area is listed as "NWH TSZ."
For safety zone map/coordinates:
Establishment of Northwest Harbor Temporary Safety Zone