RedactedNarrative: Vessels 1 and 2 were in a "head-on" situation.  According to the statements of vessel operator 1 and the surviving passenger of vessel 2, both vessels had made changes in course but neither vessel made a large enough course change to make it readily apparent to the other what their intentions were.  Neither vessel slackened their speed or stopped to avoid the collision.  Vessel 2 impacted with the starboard rear quarter of vessel 1 when vessel 1 made a last effort to avoid a head - on collision with vessel 2 by increasing speed and turning to port.