An apparatus for selectively repositioning a battery (106; 206; 406) and a main electronics housing ("MEH") (104; 204) within a submersible craft (100; 200; 300) effective to selectively invert the submersible craft (100; 200; 300), comprising: a battery (106; 206; 406); a battery rail apparatus including a first battery frame rail (120; 220; 320) substantially vertically oriented within the submersible craft (100; 200; 300) and a second battery frame rail (122; 222; 322) substantially vertically oriented within the submersible craft (100; 200; 300), wherein the first battery frame rail (120; 220; 320) is positioned on a first side of the submersible craft (100; 200; 300) opposite the second battery frame rail (122; 222; 322) positioned on a second side of the submersible craft (100; 200; 300), wherein a first end of the battery (106; 206; 406) is slidably connected to the first battery frame rail (120; 220; 320) and a second end of the battery (106; 206; 406) is slidably connected to the second battery frame rail (122; 222; 322); an MEH (104; 204); an MEH rail apparatus including a first MEH frame rail (116; 216; 316) substantially vertically oriented within the submersible craft (100; 200; 300) and a second MEH frame rail (118; 218; 318) substantially vertically oriented within the submersible craft (100; 200; 300), wherein the first MEH frame rail (116; 216; 316) is positioned on a first side of the submersible craft (100; 200; 300) opposite the second MEH frame rail (118; 218; 318) positioned on a second side of the submersible craft (100; 200; 300), wherein a first end of the MEH (104; 204) is slidably connected to the first MEH frame rail (116; 216; 316) and a second end of the MEH (104; 204) is slidably connected to the second MEH frame rail (118; 218; 318); and wherein the battery (106; 206; 406) comprises a substantially negative buoyancy and the MEH (104; 204) comprises a substantially positive buoyancy. a battery (106; 206; 406); a battery rail apparatus including a first battery frame rail (120; 220; 320) substantially vertically oriented within the submersible craft (100; 200; 300) and a second battery frame rail (122; 222; 322) substantially vertically oriented within the submersible craft (100; 200; 300), wherein the first battery frame rail (120; 220; 320) is positioned on a first side of the submersible craft (100; 200; 300) opposite the second battery frame rail (122; 222; 322) positioned on a second side of the submersible craft (100; 200; 300), wherein a first end of the battery (106; 206; 406) is slidably connected to the first battery frame rail (120; 220; 320) and a second end of the battery (106; 206; 406) is slidably connected to the second battery frame rail (122; 222; 322); wherein the first battery frame rail (120; 220; 320) is positioned on a first side of the submersible craft (100; 200; 300) opposite the second battery frame rail (122; 222; 322) positioned on a second side of the submersible craft (100; 200; 300), wherein a first end of the battery (106; 206; 406) is slidably connected to the first battery frame rail (120; 220; 320) and a second end of the battery (106; 206; 406) is slidably connected to the second battery frame rail (122; 222; 322); an MEH (104; 204); an MEH rail apparatus including a first MEH frame rail (116; 216; 316) substantially vertically oriented within the submersible craft (100; 200; 300) and a second MEH frame rail (118; 218; 318) substantially vertically oriented within the submersible craft (100; 200; 300), wherein the first MEH frame rail (116; 216; 316) is positioned on a first side of the submersible craft (100; 200; 300) opposite the second MEH frame rail (118; 218; 318) positioned on a second side of the submersible craft (100; 200; 300), wherein a first end of the MEH (104; 204) is slidably connected to the first MEH frame rail (116; 216; 316) and a second end of the MEH (104; 204) is slidably connected to the second MEH frame rail (118; 218; 318); and wherein the first MEH frame rail (116; 216; 316) is positioned on a first side of the submersible craft (100; 200; 300) opposite the second MEH frame rail (118; 218; 318) positioned on a second side of the submersible craft (100; 200; 300), wherein a first end of the MEH (104; 204) is slidably connected to the first MEH frame rail (116; 216; 316) and a second end of the MEH (104; 204) is slidably connected to the second MEH frame rail (118; 218; 318); and wherein the battery (106; 206; 406) comprises a substantially negative buoyancy and the MEH (104; 204) comprises a substantially positive buoyancy.