Easy Way to use this bug:
You need 2 bonusmaps same type and only 5 mojo, not parts of map and other s.its:
^When you are in last wave, let one small NPC => Go repair FULL HP + you need to have some voodoo points ( when you get reward from last wave, you need to be FULL HP or lose the map )
^When you are ready to sink that small NPC go to your preferated coordi and wait NPC to come to you ( When NPC stop and shoot you. Dont move your ship anymore )
^Go aruba put 5 mojo -> kill Last NPC -> Get reward -> Enter again in same bonus map, and you will be again in last wave if you dont get HP reward. Finish last wave, go repair and when you finish wave must be FULL HP AGAIN.
^Get again last wave reward. Log out from seachart . Log out from main page. Log in and you will have map back.
This bug was created intentionally by BugPoint Team, to create ammunition consumption.