When the Louis & Clark got damaged they said no rescue is coming, antenna array is shot. They implied they had no way to call for help:
MILLER: Thank you. Starck, what's our status?
STARCK: The antenna array is completely fried. We've got no radio, no laser, no high gain.
No one's coming to help.
SMITH: This air tastes bad.
PETERS: Yeah. Carbon dioxide.
STARCK: And the CO2 filters here are shot.
Then they went through all the horrors of the film until Weir went mad. But after the gravity drive went online Miller decided to blow the ship in two, and told Cooper to go activate the distress beacon:
MILLER: separate us from the ship, use the foredecks as a lifeboat. TDRS should pick up our emergency beacon.
We put ourselves in stasis, and stand by for rescue.
MILLER: (to COOPER) Go activate the emergency beacon and you get back here.
Why didn’t they activate the beacon as soon as they got stranded?