Where to start reading about the Roman navy

Where should a reader look for work on Roman naval forces along the limes, especially in Pannonia?

Simon Elliott's books are the recommended starting point, although the exact title covering Pannonia is not identified in the answer.

Simon Elliott is recommended as the first author to consult on the Roman navy. His books cover Roman naval subjects broadly enough to make them a useful starting point for frontier forces. The answer does not identify which volume discusses Pannonia or the riverine limes in detail. Readers should therefore treat this as an author recommendation and verify the contents of individual titles before choosing one.