Petty Officer Sean Gallagher

A talented Royal Navy sonar operator capable of detecting massive sea creatures beneath the Atlantic. Gallagher often becomes the first person to sense approaching leviathans.

Petty Officer Sean Gallagher is one of the most skilled sonar operators in the Royal Navy. Born in Ireland, Gallagher joined the navy at a young age and quickly developed a talent for interpreting sonar signals. Most sailors struggle to read the confusing echoes produced by underwater objects. Gallagher treats them like a language. When the first leviathans began appearing in the Atlantic, his skills became invaluable. More than once, Gallagher detected the creatures approaching long before they reached the fleet, giving ships precious minutes to prepare. Working aboard the destroyer flagship of Commander Hartley’s task force, Gallagher provides constant underwater surveillance. His station is often the first warning the fleet receives when something massive begins moving beneath the waves. Though young compared to many officers, Gallagher’s instincts have saved countless lives. And in the monster-filled waters of the Atlantic… Those instincts are the fleet’s best defense.

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