So you slow, drop the pick. Pay out minimum cable. Enough so you are at a ‘short stay’. Then proceed slow ahead. It seems the bottom is sand and shale so fairly easy, with decent GPS, to drag the anchor using minimum revs.
BTW this is anchors and clankers. Seamanship.
This is so my thing😂
Charts are clearly marked. Any ship ‘accidentally’ letting anchor go (it wouldn’t happen) would immediately go astern but probably lose the anchor at a lugless joining shackle.
Other option is she put divers over the side but….nah.