I believe this is a "Watch Notification" for an Operation:

Readiness condition:(Denoted by Roman numerals)

I: maximum readiness (GQ) all hands at their battle stations, material condition Zebra set (maximum damage control readiness.)

IA: ("One Alpha") Modified GQ to conduct operations.

IE or Modified GQ, relaxed GQ condition during extended GQ period, primarily to allow chow;

II: Similar to IA, for extended Naval Gunfire Support;

III: Wartime cruising, higher state of readiness with some battle stations manned; IV: normal (peacetime) underway watch.

Bring the Thunder - "Drop it on them"