i'm don lemmon. welcome to our special coverage. just six days remain. that's when the batteries could die on the blacks box data reporter from malaysia airlines flight 370. that battery means no pings signaling the plane's location. though there have been a few promising pings, timing is becoming more precious now. in australia, where the search effort is based, i want to begin with cnn's will riply. he is following the ocean shield, an ocean ship with a black box detector on its way out into the southern indian ocean right now. the no bat rays means no ping signalling the missing plane's location. tell what's you're seeing right now, will ripley, as you head out, as you're shadowing this search ship? >> hey, don, we just arrived here at garden island. this is australia's largest naval base on their western coast. the reason we're here is because we're monitoring the movements here of ocean shield. you see it. you can't miss it, really, it's bright red, docked here at the naval base. it arrived here over the weekend. crews have been very busy here. they