At the risk of being accused of drifting of topic, I'll start by staying on topic and say that it is nice she sits upright as your proposed air bounce will not nessecerily have to take you to the seabed.
As for your question, certainly a contender for Lavender, with the length almost spot on. But the width of 15m adds almost half to Lavenders / Acacia Class stated width of 10m, but if it is the stern debris field adding that bit of extra width, then....Only thing, the bulky above decks 'center section' looks somewhat out of place as to what one might expect. Only way to find out is go dive it and see! Good luck!
Oh, and I envy your side scan gear that revealed those images!!! If only we............