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SpaceX's drone ships have a vehicle that drives under a booster after landing and then clamps onto it to secure it. Photos of it suggest that it has neither ballast nor any way to clamp onto the drone ship.

So how heavy is it, compared to a landed and thus low-on-fuel booster? How heavy would it have to be to stay fairly motionless despite wind loads, deck tilting, and ship maneuvers?

(Here's a detailed history of the Octagrabbers.)

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  • $\begingroup$ If you can find an answer, I would love to know. Details are pretty scant. Are you going to distingusih between the original or the two currently in use? Whether there are 3 or 2 (1 updated) is also unclear. $\endgroup$ – geoffc Nov 3 '20 at 0:01
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    $\begingroup$ Before the octograbbers, crew would board the ASDS and literally weld the legs to the floor. However, there was one mission, where they couldn't board the ASDS and had to bring the rocket back unsecured. There is some great time lapse video footage of the rocket sliding back and forth on the deck, but AFAIR, they did not lose the rocket. So, considering that even in non-trivial weather conditions, they did not need to secure the rocket at all, I suspect the weight requirements are not that high. $\endgroup$ – Jörg W Mittag Nov 3 '20 at 7:31

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