Well, dunno what kind of preparation you need for the Bionix,
but the M113 can actually "swim".
I'm not sure how but the M113 actually floats and can move in water
like a boat. But I suppose you still need some kind of ship to
transport these vehicles close to shoreline cos they move very
slowly in water.
One afternoon I was at Seletar camp by the sea and I watched a
group of armour troopers ungoing their version of "watermanship"
training in their M113.
First, the M113 swims out to sea about 30m and stops. It is
fully-loaded with a section of troopers.
Then the troopers in full helmet, rifle, SBO, they had to gingerly
climb up one by one onto the deck of the M113. Wearing a tiny
little green life vest that fits around the neck, these poor devils
had to go into the sea and swim towards the shore. Some got so
scared, cannot move and had to be rescued.
