[TEC] Question about the crews on ships

[alamwuhk2a]

Hello all, i'm new to SH4. I often see screenshots that the crews on enemy ships leave their hopeless ships, however, I don't really see them often in my own game.
How can I increase the chance of seeing them leaving upon the ship is sinking? As you all know, the Trigger Maru and Natural Sinking Mechanics give a realistic sinking time, I and do thinking the crew have enough time to escape.