"Even though he advocated Prime Chance, Bernsen harbored some doubts about
the Little Birds’ stealth capability, worried that Iranian ships would be
able to identify and target them. The Night Stalker commander, Lt. Col. Bob
Codney, set up an exercise to allay those concerns. On a moonless night, a
pair of Little Birds was launched on a “patrol.” A half-hour later they
reappeared – directly in front of the La Salle’s bridge. The first thing
Bernsen or anyone else in the bridge knew of their presence was when they
received the radio message: “Bang. You’re dead.” Bernsen was sold. From that
point on, the call sign for the Night Stalkers in the Gulf was “Seabats.” [5]
https://sci.military.naval.narkive.com/DXgQG8Nj/video-operation-praying-mantis-the-u-s-navy-vs-iranian-forces-1988