[DB]

Unless Israel claims it so, how would anyone actually know Israel used a sub or stealth planes in a “strike”?

[edpc]

Probably the same way we “know” they have nukes.
They don’t really acknowledge it, but a lot of things make it fairly evident. There’s always a source and operational analysis that leads to certain conclusions. Likely that’ll occur at some point.

[tanknetter]

Unless Israel claims it so, how would anyone actually know Israel used a sub or stealth planes in a “strike”?

Start with the assumption that it was Israel, regardless. Then ask, how would someone know it was a sub?

The Red Sea is pretty heavily trafficked. Launching one or more sub-based land-attack missiles stands a good chance to be noticed.

In fact, it would be in Israel's best interest to launch from a position where it WOULD be noticed. Because it would be a clear demonstration of their capability while still retaining some plausible deniability.