YOU SAID:
you should familiarize yourself with the area
INTO JAPANESE
あなたはその地域に慣れておくべきです
BACK INTO ENGLISH
You should be familiar with the area
INTO JAPANESE
このエリアに精通している必要がある
BACK INTO ENGLISH
Must be familiar with the area
INTO JAPANESE
このエリアに精通している必要があります
BACK INTO ENGLISH
You must be familiar with this area
INTO JAPANESE
このエリアに精通している必要があります
BACK INTO ENGLISH
You must be familiar with this area
That didn't even make that much sense in English.