I worked a similar "landing" in Escambia Bay, Florida in May 1978. That involved a Boeing 727 in shallow water with the landing gear down.

We had 3 dead to deal with, 1 elderly lady, wearing a lifejacket, successfully egressed to then die of Cardiac Siezure; and 1 young lady (Francis Lane) and an older gentleman who both egressed from the stbd aft hatch without life jackets. The divers recovered both of them from under the stbd engine.

The belly was ripped open but the aircraft was lifted onto a barge, taken to Pensacola Naval Airstation, and repaired enough to fly out to a commercial repair facility.

In both of these instances, a towboat (in 1978) and tugboats (today), were on the scene where the "landings" occurred and they were largely responsible for the safe recovery of most of the passengers.