The National Marine Fisheries Service (NMFS) proposes Atlantic tuna fishery management measures.  Specifically, NMFS proposes a rule to authorize green-stick gear for harvest of Atlantic tunas, including bluefin tuna (BFT), in the Atlantic Tunas General, Highly Migratory Species (HMS) Charter/Headboat (CHB), and Atlantic Tunas Longline categories; authorize harpoon use for harvest of Atlantic tunas, including BFT, in the HMS CHB permit category on non-for-hire trips; and require possession and use of a sea turtle control device in pelagic longline and bottom longline fisheries.  Public requests for authorization of these fishing gears led NMFS to analyze and consider their use.  NMFS subsequently determined that use of these gears would allow efficient harvest of Atlantic tunas with low bycatch and bycatch mortality.  The purpose of this proposed rule is to provide additional opportunities for fishermen to harvest Atlantic tunas within quotas, size limits, or other established limitations and to distinguish green-stick fishing gear from current definitions of other authorized gear types.  The rule regarding harpoon use is also intended to provide consistency in the regulations regarding authorized handgear used historically for commercial harvest of BFT.  The purpose of the proposed rule to require sea turtle control devices in the pelagic longline and bottom longline fisheries is to achieve and maintain low post-release mortality of sea turtles thus maintaining consistency with the 2004 Biological Opinion for the Atlantic pelagic longline fishery and to increase safety at sea for fishermen when handling sea turtles caught or entangled in longline fishing gear.