Competence or incompetence can be only judged if the vessel was without escort on a sea route. Landing ship in war operation must be escorted / protected. But we dont know this part.
Now about landing or ro ro vessels
Let me give a comment as deep sea master.
What I learn from the photo of the this ship class, and then double checked on internet, this class of vessel is built to transport cargo on wheels or trucks. It has a large collapsible cargo platform on the stern and similar system on the bow. The ship hul will open in port or on the beach, and vehicles will roll out.
In merchant navy, these would be most comparable to ro ro vessels, built to carry cars and trucks.
Generally, in order to keep buoyancy, ships, either navy or merchant have watertight compartments, those are first double hull, double bottom tanks, and secondly separate cargo compartments, plus compartmentalized accommodation (superstructure).
However, in practical terms, ro ro carriers, generally sink the most, having most issues with stability.
Cargo on wheels take to much space, there is a lot of unused space in the volume of cargo hold. There are problems to lash (secure) the cargo which can move during heavy rolling, and in case of flooding. In case fast moving operation is required the cars are not lashed, kept in cargo hold on a "hand brake".
Basically, you get a water ingress in a cargo hold, then a serious flood in a cargo hold, and cannot control the list, because cargo will move in the direction of first listing, and will not come back. Everything will end up on one side. Stability compromised.
Center cargo hold in roro is typical, but can be divided in vertical decks.
(ro ro means roll on roll off)
This is unlike the other ships, that can divide cargo holds, transversally, in at least 3 transferal compartments (port, stbd, center). and several compartments along the length of ship, depending of type.
Most probably, a navy vessel (built under different construction rules) - like frigate, or destroyer, will have even more compartments within the hull and superstructure (and will be much hareder to sink),
but not a landing ship which is designed to deliver cargo on wheels or tracks, in a fast manner from one or two cargo decks, as a single compartment, most probably without division in cargo hold. (imagine 100 meters of ship cargo hull, full of water.)
Flooding of cargo compartment will move cargo on wheels (cars, trucks etc), ship will loose stability, and will likely capsize and then sink.
Most vulnerable type of ship. (lloyd insurance will confirm, I am sure)
Example, photo from internet. Ro Ro, total loss. On this photo probably by this moment, all cargo on wheels is jammed on port side of vessels cargo holds, on 7 or 9 cargo decks. Cargo platform is on stern not visible on this photo. You can imagine that type of ship, being hit broad side with some explosive charge near water line?
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