The MV Dali DID drop anchor. Didn’t slow it down much.
Is it true that the Dali had 4 anchors?
Correct. Mud bottom (and dredged) — the anchor adds a little drag, that’s about it. Catch something solid and you rip out a chunk of the ship. One of the marine shipping people cited 1/2 knot as the maximum safe speed for a ship this massive to drop anchor if there’s any chance it will “catch”.