From: LI, NY
The Jake/Rex equipped ships can use them as effective search planes.
Rex is a fighter, and to date (7/43 game wise), I've not noticed one BB/CA/CL that'll convert to this A/C.
That being said, as a JFB I use my Jake's in various rolls. For Japan BB's carry 3 Jake, except the Yamato's, which carry 7. Most CA carry 2/3, with two that carry 5. One CA is 'convertible' and will carry 10 or 11, but no Rex. Four BB are also convertible and will carry 20 or 22, I forget which. But that's much later in the game and its value is questionable.
At any rate I tend to use my ships as divisions (two ships). Each will perform a different task depending on the mission/situation. This includes, search, ASW, recon, night search. All training will be done while in port, which is where most Japanese 'heavies' should be, at least after the initial expansion.
Keep in mind that Japanese ships were designed to have a larger search plane capacity as their doctrine relied more heavily on the float plane. This was for better or worse... See Midway.
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