This technique shows the Indonesians are inadequately prepared for wreckage recovery, with a shortage of adequate marine craneage, and they care little about preserving the wreckage in "as-found" condition, to be able to figure out impact forces, angles, speed, etc.
Umm, they actually have engineers from Airbus advising. I believe the general plan is to cut up the tail section into several pieces and then ship them to Jakarta.