N9NWO wrote:
It is thought that other systems are replaced, the 25mm
will become the primary light cannon round. Thus the Navy
CIWS (Phalanx) may migrate towards this round with newer
ships (ie DD-X).

There have been plenty of proposals for 25mm versions of Phalanx, but not
much interest from the Navy. They figure than if a maginal increase in
capability is needed, the 20mm Enhanced Lethality Cartridge could be
reinstated. It's always been reported as having the same effectiveness as a
conventional 25mm sabot round.

In general, however, the Navy is migrating to no gun-based CIWS at all.
LPD-17 has just RAM and 30mm Mk 46 turrets for small-baot defense. Unless
things change from what was shown at concept design, DD(X) will have 40mm
guns for close-in defnse, but not for anti-missile duties. If they do
change, I think the most likely swap will be to 30mm MK 46 turrets in place
of the 40mm, but still with no missile-defense role. For anti-missile
defense, it will rely on ESSM.

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"Our country, right or wrong. When right, to be kept right, when
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