Chief pick up a signal pattern that matched Cortana's, and it led him to the front of a swamp. It's filled with red water hyacinth.
"I can't swim with this armor, and the water seems to be poisonous"
"I have to get over this deadly swamp. What should I do? Cortana, where are you?" Chief is in despair
"I can't swim with this armor, and the water seems to be poisonous"
"I have to get over this deadly swamp. What should I do? Cortana, where are you?" Chief is in despair