YOU SAID:
You are going to need a bigger boat
INTO JAPANESE
あなたは大きな船を必要としています
BACK INTO ENGLISH
You will not need a big ship
INTO JAPANESE
あなたは大きな船を必要としません
BACK INTO ENGLISH
You do not need a big ship
INTO JAPANESE
あなたは大きな船を必要としません
BACK INTO ENGLISH
You do not need a big ship
That didn't even make that much sense in English.