As is the case here with Scott attempting to pull the Jet out of the dive but ultimately gets Thunderbird 1 pulled down with it.
I think if International Rescue got the job done every single time without any complications, there wouldn't be that sense of tension and danger that is necessary for a suspenseful series.
One aspect that has come into play with this Generation is that like this series incarnation of John Tracy; Thunderbird 1 is playing more of a role in helping a rescue as opposed to just being a recon vehicle and relaying information back to Thunderbird 5 and base and advising his Brothers on what course of action to make. Basically, this Scott does get his fingers dirty more often.
The only thing that the 60's Thunderbird 1 has over this is that that version had more equipment from sonar that could be lowered into the water from the ship, a remote control camera that go into environments of different shape and size that TB1 couldn't and that steel graph poles that were used in the End of the road preventing more rocks from hitting the tractor that Eddie Houseman was in.
This version just seems to use the grappling hook and can be remote piloted by Scott's holo-wrist control.
Now one could argue that I'm reading too deeply into this and that more features and equipment from IR's recon vessel will follow in future episodes.
This Preview really doesn't show much other than Thunderbird 1 and it's rescuee in jeopardy. But all will be revealed on Saturday