Simplify the following text for a Grade 7 native English-speaking person.
Original: HMAS Ararat ( K 34 ) , a World War II Bathurst class corvette , and HMAS Ararat ( ACPB 89 ) , an Armidale class patrol boat .
Simplified: HMAS Ararat ( K 34 ) , a Bathurst class corvette , and HMAS Ararat ( ACPB 89 ) , an Armidale class patrol boat .