Opinion | On Patrol in the Baltic for Russian Saboteurs

Aboard the Estonian Navy Ship Sakala

‘Here be dragons,” cartographers in the Middle Ages wrote of uncharted waters. Not here in the Baltic Sea, where U.S. allies and adversaries can map exactly what critical infrastructure rests underwater. On a freezing February morning, the Estonian navy prowled after another type of sea monster: Russian saboteurs. Estonia’s dilemma is what to do if it snares one.