The North Carolina Sounds occupy most of the coast from Cape Lookout (North Carolina) to the Virginia border. With their eastern borders marked by the Outer Banks, they were almost ideally located for raiding Northern maritime commerce. Cape Hatteras, the easternmost point in the Confederacy, is within sight of the Gulf Stream, which moves at a speed of about 3 knots (1.5 m/s) at this latitude. Ships in the Caribbean trade would reduce the time of their homeward journeys to New York, Philadelphia, or Boston by riding the stream to the north. Raiders, either privateers or state-owned vessels, could lie inside, protected from both the weather and from Yankee blockaders, until an undefended victim appeared. Watchers stationed at the Hatteras lighthouse would then signal a raider, which would dash out and make a capture, often being able to return the same day.