They didn’t land.
The thing has been checked (and, if all goes well, without significant damage) has come back down. For space concepts that fits, in my opinion, perfectly within the meaning of “landed”. What Van Dale says is well and good, but they only refer to the general meaning of a word; it is perfectly normal for specific groups to give a subtle different meaning to a word: just look in Van Dale what “jargon” means. Oh and, according to the definition in Van Dale, there would never have been a moon landing either …
They tied a parachute to the first stage of a rocket and then dumped it into the sea in a controlled manner. Something the Americans have been doing with the nose cone since the 1950s, but really on land.
No examples of American capsules landing on land come to my mind so quickly (for Crew Dragon that was the plan, but now it lands in the sea anyway; Starliner once had the idea of landing on land, but I don’t know if that is still the case). I dare not say whether they never did, but even if they did, it is the exception, not the rule. I think you’re confused with the Soviet Union / Russia (and they had to, because they don’t have a launch base by the sea).
And if we put salt on all snails: “since the 50s” is also wrong: the first Mercury flight was only in September 1959; the first manned flight even lasted until 1961.
In addition, why is it that Nasa has been able to do it for a long time? Then Crew 1 wouldn’t have been news either. And then we can also forget the flights of Shepard and Glenn; That Nasa can do a trick that the Russians have done before is not interesting, is it? The whole idea of space travel in the 21st century is precisely that commercial companies take over from governments; We are aware that old milestones are now being tapped again, before the commercials Nasa and Roskosmos pass by.
Why in the sea? On land he had lain in wrinkles.
So it’s bad that the folks at Rocket Lab know what they’re doing …!? I mean, otherwise we could start with this kind of nonsense too: “Why are they launching upwards? If they shoot him into the ground, he would have been in the creases.”
Now they also have to see whether parts can be reused after the salty seawater. I don’t read that the parts are designed for reuse the way SpaceX has.
To be precise: you don’t read at all. This was the first test; Ultimately it is the intention that Electron does not end up in the water but is literally plucked from the air.
Rocket Lab therefore wants to return the boosters to parachutes. Helicopters then have to collect the boosters from the air.