Horn Island, Jackson County, MS (west/northwestern tip) — exact GPS coordinates not publicly released

GPS data from the Mississippi Department of Marine Resources, obtained by CBS News, tracks the boat's full route on July 4: departing the Ocean Springs area at 9:56 a.m., arriving at Horn Island at 11:14 a.m., a bilge pump failure and distress call near the island's west tip around 4 p.m., departing Horn Island at 4:31 p.m. under tow, into Fort Bayou at 5:52 p.m., back at the original dock at 6:06 p.m., then departing again from the Fort Bayou Boat Launch at 7:19 p.m. before being towed to a residence in Biloxi.