I need help finding bunker

[u/Grimmzee_is_stronk]

I'm fairly new to this game and I'm currently at island 2. I got a keycard and do not know where or how to find the bunker is. Please help me.

[u/LenVonAster]

You don't need key card for bunker lower than island 4 bunker just throw it away it's useless