...driving the bus onto a small boat...
...to cross to Sri Lanka one first had to go from mainland India with a freight train to the island of Rameswaram,
there was no road/bridge, then from Rameswaram first onto a small boat from which the bus would be hauled up onto
an old ferry boat that was anchored off shore....

(image taken with camera of a monitor showing a still from a digitised super8 movie, image processed from NEF in Capture NX2)