Operator of vessel a related that they left Rota Island at 0400 hrs., to Saipan.  They were fishing (trolling) on the way north and about that distance mentioned about, operator decided to stop the boat to reel in their fishing lines.  From there, they noticed their boat taking in water so fast which they don't have time to call for help because it was capsizing.  Later rescue arrived and they got rescued.
Between Rota and Tinian Island