Continuity mistake: When Radar and Burns leave the tent for morning parade, Radar's clipboard acquires a pencil. (00:02:50)
Audio problem: When the soldiers in the back come flying through the window, you hear a window pane break and cullets tingle when the window is in fact a Japanese-style paper window. (00:43:40)
Continuity mistake: During the shelling on the road, BJ gets very muddy. When they get to the bar, he is much cleaner - e.g. all the mud has disappeared from his right arm. (00:44:30)
Visible crew/equipment: When Frank climbs into the jeep belonging to Major General Cornell Dickering, the MPs show up at the same time that BJ and Hawkeye walk up to join the fun, and during this scene there's a T-mark (albeit a dusty one) on the ground at the driver's side of the jeep.
Continuity mistake: When Hawkeye and Radar leave the 4077 in the jeep, the last three numbers on the hood are "717" but when they get to Kimpo it's a different serial number ending in "388."
Continuity mistake: When Radar and Hawkeye leave the 4077, the jeep they're in has its windshield in the fold-down position over the hood, but in the two shots from behind Hawkeye and Radar when they see the checkpoint up ahead and Hawkeye speeds up, the windshield has vanished and there's a star on the hood.
Visible crew/equipment: When Hawkeye removes BJ's Captain rank bars from his uniform and then pins it on Radar's knit cap, in the shot facing Hawkeye and BJ the shadow of the boom mic moves across Radar's back.
Continuity mistake: After speeding past the checkpoint Hawkeye's stopped by the MPs, and when the lieutenant takes hold of one of Hawkeye's dog tags he's holding the one on the extender chain, but next shot he's holding the other dog tag, with the extender chain and second dog tag hanging down.
Visible crew/equipment: When Hawkeye and Radar are in the jeep heading to Kimpo Air Base they drive past the checkpoint, and in their closeups the camera casts a shadow on the hood of the jeep.
Continuity mistake: In the assembly called by Major Burns at the beginning of the show, Klinger is in the front rank far left (except when the continuity error has him centre rear), but after the appearance of Hawkeye in the rickshaw Klinger isn't on parade at all.
Factual error: As Hawkeye, Radar' and BJ stop to change the flat, Hawkeye uses a scissor jack to raise the Jeep. However, the scissor jack was not in use for this model of Jeep.
Continuity mistake: In the Commander's office, Frank's arms go from being in front of MacArthur's picture frame, to gone, and back again in a matter of a few seconds.
Other mistake: In the opening, when the flags were raised, the United Nations flag is hung upside down.
Continuity mistake: When BJ, Hawkeye and Radar are being shot at, they hurry to get in the jeep. Radar gets out to get the jack, and salutes it. When the camera cuts to a shot of Radar getting back in, the jack is magically gone. It doesn't appear again.
Continuity mistake: On the way to catch Trapper, Hawkeye and Radar are stopped by an MP checkpoint. After bluffing the MP with a story about neuropraxia, the MP pumps his fist in the air saying "Move out!" The camera cuts to a wide shot and the MP is starting to pump his fist in the air again, and says "Move out!" again.
Continuity mistake: At several points, in the second half of the episode, you can see the identification number (2A401) on the general's jeep that Hawkeye stole. As well as the big star, showing it to be a general's jeep. At the end of the episode, Col. Potter shows up for the first time, in the same jeep.
Continuity mistake: When BJ arrives in Korea, he, Hawkeye and Radar are attacked by guerillas while changing a flat tire on their jeep. After installing the spare tire from the back of the jeep, Hawkeye rolls the flat tire off the to the side of the road and jumps into the jeep as Radar speeds off. Later, when they reach the camp, the spare tire has reappeared on the back of the jeep.
Continuity mistake: When Radar calls assembly, the very first shot shows some troops appearing on the parade ground. Klinger, in his straw hat, appears on parade in the front rank in the top right hand corner of the screen and stands to attention. In the next shot, however, he is seen approaching the parade ground at the double from the Post Op ward building. Next shot, he is on parade, but in the centre of the rear rank. A couple of shots later, when Major Burns addresses the troops, he is back in the front rank - screen top right. This position is confirmed later when Burns addresses him by turning his head sharp left (he is facing the parade), and Hoolihan is seen marching over to him to remove his hat.
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.