He took charge of Collapsible B, and steadied it, and got them organized. And, when (I think) Lifeboat 14 came by with Lowe, Lightoller blew his Whistle. Collapsible B was sinking, the water was already over their anklesWhat special thing did Lightoller do on the overturned Collapsible B that could be described as "heroic"? As I see it, he was one of several who managed to clamber aboard the "raft" and survive to tell the tale. Except that Lightoller's 'tale' had more carefully calculated embellishments that were accepted.....at least long enough for him.