April Fools - S8-E25
Visible crew/equipment: At the Officers' Club, after Potter and Tucker's practical joke is out of the bag and they're congratulated, when it cuts to everyone sitting at the bar, at the start of this shot the boom mic is visible at the top, left side of the screen just before it's pulled up.
April Fools - S8-E25
Visible crew/equipment: After the scene with Klinger, who's dressed as Cleopatra, lying down on his cot in the office, when it cuts to the shot of the Swamp as it pans out, we can see the corner of the Swamp set at the top, left side of the screen.
April Fools - S8-E25
Visible crew/equipment: When Klinger wakes everyone up in the Swamp, just as Hawkeye asks Klinger if he saw anyone else lurking around the Swamp, the shadow of the boom mic can be seen moving at the top, left side of the screen.
April Fools - S8-E25
Visible crew/equipment: After the opening credits, in the closeup of Charles and Colonel Potter just as Charles complains about what's undoubtedly awaiting them in the mess tent, there's a shadow of a moving boom mic at the top, left corner of the curtain.
Answer: It is actually Cencompac for Central Command of the Pacific. It is like the headquarters for all military activity in the Pacific Region (Japan, Korea, Okinawa, etc. The newer version of that is United States Pacific Command (USPACOM).
EMTurbo
And the abbreviations were used mainly by the Navy. Especially CENCOMPAC.
Https://en.wikipedia.org/wiki/United_States_Indo-Pacific_Command.