Enemy shore batteries on Sin-do directed heavy fire upon Pirate, which sank shortly thereafter, and then upon Pledge. As Pledge attempted to maneuver, she too struck a mine and was severely damaged.
Pirate was subjected to intense bombardment by enemy shore batteries on Sin-do, which ultimately led to its sinking shortly thereafter. Subsequently, Pledge came under attack as well, and despite efforts to reposition, she struck a mine and sustained severe damage.