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stargate - Why don't they cloak the jumpers before entering the gate?


On several occasions our heroes in Stargate Atlantis worry that their gateship may have been detected between exiting the stargate and activating the cloak.


Why don't they just cloak before they go through the gate?



Answer




We see in various episodes, such as "The Siege, Part 3" that the use of a cloak negates any shielding the vessel may possess. Given that they're entering an unknown situation (where the enemy may simply be firing continuously at the gate), it makes tactical sense to use the main shields when entering the gate, then cloak afterwards.


In the episode "The Shrine" we see precisely this situation. I've edited for brevity...



In the Gateroom, a M.A.L.P. trundles into the open Stargate. As it reaches the other side, Richard looks at the video footage which it is sending back. Two Wraith Hive ships are on the ground on hillsides either side of the Gate. He reports on what he's seeing.


WOOLSEY: The M.A.L.P. is clear of the Gate and they're firing on it from both sides of what appears to be a deep valley.


The Jumper lowers down into the Gateroom.


WOOLSEY: It's deploying smoke. You should have complete coverage of the area in five seconds.


(The Jumper flies into the Gate.)


TALUS. The Jumper exits the Gate and soars forward through a thick cloud of smoke. Its cloak can be heard deploying as it races up into the sky. It turns around and heads back the way it came to take a look at the two Hive ships.


TEYLA: Do you think they detected us before we were able to cloak?



SHEPPARD: No, I think the smokescreen worked. Hopefully they think we just sent the M.A.L.P. through ahead of us and changed our mind when they blew it up.



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