Sea Marshal tasked with security; disarms a bomb, neutralizes a terrorist, and leads a critical search-and-rescue operation through the capsized vessel.
Their positions place them on opposing sides of the ship's terrorist crisis, although the plot does not describe a direct confrontation between them.
Rogo leads a security operation against the terrorists while Shoshanna is part of the group moving through the ship with the suspected terrorist.
Rogo's security leadership and Ballard's medical assistance support the same escape effort.
Rogo's group eventually meets Richard's group, which includes Ballard, and the combined survivors proceed toward the engine room.
They become cooperating survivors during the effort to escape the capsized ship.
Rogo's group later meets Richard's group, and the survivors continue together toward the bomb-damaged hull and the engine room.
Explore the full interactive character relationship map of The Poseidon Adventure