<Tr> <Th> Non-NATO rank </Th> <Td> O - 6 </Td> </Tr> <Tr> <Th> Next higher rank </Th> <Td> Rear admiral (lower half) </Td> </Tr> <Tr> <Th> Next lower rank </Th> <Td> Commander </Td> </Tr> <Tr> <Th> Equivalent ranks </Th> <Td> Colonel (United States Army, Marine Corps, and Air Force) </Td> </Tr>

How to be a captain in the navy