"John R Weiss" wrote:

:In the US navy, the nuclear powered carriers only carry JP4 or JP8 (and all
n-board diesel-powered equipment use the JP), so any smaller ships that refuel
:from the carrier (a relatively common practice) get the jet fuel.

The US Navy uses neither of these fuels at sea, even to fill aircraft,
much less to fill large ship's tanks. The Navy switched from JP4
(which is a hideously dangerous fuel) to JP5 about half a century ago.
The Air Force later switched from JP4 to JP8 (essentially Jet-A).

The Navy currently uses JP8 ashore (because it's cheaper and easier to
get) and JP5 at sea (because it's safer).

--
"Insisting on perfect safety is for people who don't have the balls to
live in the real world." -- Mary Shafer, NASA Dryden