The head-on encounter:-
In this situation interaction is less likely to have a dangerous effect as generally the bows of the two vessels will tend to repel each other as they approach.
However, this can lead indirectly to a critical situation. It may increase any existing swing and also be complicated by secondary interaction such as bank rejection from the edge of a channel. In all cases it is essential to maximise the distance between the two vessels.
The watch keeper on the larger vessel should bearing mind the effect on adjacent smaller vessels and take necessary care when manoeuvring.