...Meister Babylon, I have no idea whether you're using some other nation's terminology, or making up your own, but CL is the hull code for Light Cruiser, as laid down by the London Naval Treaty.
The various smaller ships escorting
Big Catch were armed merchantmen similar to
Lightning 11, incidentally.
Also, do note that in prior episodes, Misa mentioned that the cutoff point for a pirate ship to maintain the Letter of Marque was that they had to be
junyokan - cruiser-class - or better, and that
Bentenmaru was near the cutoff point. That said I'll need to rewatch and figure out whether they mentioned
kei-junyokan (light cruiser, CL) or
itto-junyokan (heavy cruiser, CA) specifically.
A combat vessel intended to operate in littoral waters would range from a patrol boat at the low end, to a corvette at the medium end, with a frigate being the highest displacement you could have (it should be noted that many navies in littoral waters, particularly the Swedes and Norwegians, use a lot of corvettes with the occasional frigate). Not a light or heavy cruiser, which, as the name suggests, is intended for long range cruising on the open seas.
...seriously, Kha, I hope for your patients' sake that you don't mix up your terminology and methods. Wouldn't want you to prescribe methadone for a baby with jaundice, or panadol for a malaria patient, or a cast for a sprained ankle.
