You're thinking about it the wrong way. The way the show is written, they are deliberately vague about the chain of command.
Think of it like this (in s5):
Woolsey = expedition head
Shep = military commander
Rodney = head of science
Keller = head of medicine
Teyla/Ronon = member of SGA1, allies
Woolsey is the supervisor of all departments.
Shep is his 2IC. In Woolseys absence, shep becomes acting expedition leader. The assumption is that if Woolsey & Shep got kawooshed by the stargate, the next highest ranking military officer (Major Lorne usually, unless the Deadalus or Apollo are around) would be in acting command until a new expedition head was appointed, be they military or civilian.
TPTB are deliberately vague as to the real chain of command, so as not to be hampered by actor availability and plot holes.
In the SGC, in the event of the commander's absence, leadership fell to the next highest ranking officer at that point. Although even then, they managed to be consistently inconsistent with regards to rank and seniority
Think of it like this (in s5):
Woolsey = expedition head
Shep = military commander
Rodney = head of science
Keller = head of medicine
Teyla/Ronon = member of SGA1, allies
Woolsey is the supervisor of all departments.
Shep is his 2IC. In Woolseys absence, shep becomes acting expedition leader. The assumption is that if Woolsey & Shep got kawooshed by the stargate, the next highest ranking military officer (Major Lorne usually, unless the Deadalus or Apollo are around) would be in acting command until a new expedition head was appointed, be they military or civilian.
TPTB are deliberately vague as to the real chain of command, so as not to be hampered by actor availability and plot holes.
In the SGC, in the event of the commander's absence, leadership fell to the next highest ranking officer at that point. Although even then, they managed to be consistently inconsistent with regards to rank and seniority
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