Visible crew/equipment: While BJ's holding Peg's letter and telling Hawkeye about being homesick and depressed, the edge of the Swamp set can be seen at the top, left corner of the screen.
Visible crew/equipment: After Radar shows the box of bees to BJ and Hawkeye, when BJ gets in the jeep and drives off, just before the shot cuts away we can see the T-mark on the ground at Radar's feet.
Visible crew/equipment: After a 14 hour shift in the OR, when sleepy BJ and Hawkeye are in the change room just as Hawkeye says, "Let's face it, their demand is bigger than your supply," the shadow of the moving boom mic is visible on the curtain.
Visible crew/equipment: When Klinger's in Colonel Potter's office wearing the fur coat and rubber reducing suit, just as Potter says, "This one is definitely in the running," we can see the shadow of the boom mic shaking up and down on the wall, at the left side of the screen.
Peace on Us - S7-E2
Visible crew/equipment: When Radar gets off the phone with the guard at Panmunjom and tells Colonel Potter and BJ that Hawkeye's gone on ahead, at the start of the next shot we can see the back of the soundstage set at the top, right side of the screen. And notice that Hawkeye's and the guards' voices are echoey on the soundstage in this shot.
Visible crew/equipment: After Margaret tells Hawkeye that he ran the siege pretty well then salutes him, when it cuts to BJ returning to camp with the wounded GI, the boom mic dips into view at the top of the screen.
Visible crew/equipment: As the M.P. jeep escorting the General's jeep gets close to the camera, a reflection of a lighting rig or reflector is seen in the right windscreen.
Visible crew/equipment: As Klinger sits in the chair dressed in a winter coat, you can see the boom mic and light panel reflected in his shades.
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.