by Ann Hoffner A wellfound sailboat making its way across the South Pacific strikes a whale; within minutes water enters the bilge. It’s impossible to find the source and those on board decide to seek assistance. The crewmember assigned to communications hurries to the nav station, pushes the red distress button on the VHF radio. Why did they do that? It’s only a short range radio, how can it help from the middle of the ocean? Because the red button means its equipped with digital selective calling (DSC), and pushing that button automatically sent out a message and will keep…