"Fred J. McCall" wrote...

:In the US navy, the nuclear powered carriers only carry JP4 or JP8

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).

Yep! That was a typo -- I meant JP5 or JP8. Thanks for the catch.


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

OK. It appears sanity won over economics. There was talk in the late 80s/early
90s to transition from JP5 to JP8 at sea as well as the JP4 - JP8 transition
ashore.