Visible crew/equipment: When Klinger's at Little Chicago he asks one of the black market vendors about cameras and he points to another vendor, and when it cuts to the next shot we can see the actor's T-mark on the ground where the man walks away (his foot even moves the T-mark) and Klinger is about to stand.
Visible crew/equipment: After Colonel Potter gets off the phone, he tells Klinger about Torgy Porgy and how after four years of medical school Torgy washed out, and just as Potter and Klinger stand up lighting equipment can be seen at the top right side of the screen.
Visible crew/equipment: At the end, after Father Mulcahy says goodbye to Sarah, when it cuts to a wideshot we can see two actors' rubber T-marks on the ground. The first is behind Father Mulcahy's feet, a white T-mark (albeit dirty) where Sarah had been standing, and the second becomes visible when Klinger runs over and bumps into Kellye, he kicks up some dirt which causes the black rubber T-mark to flip up off the ground.
Visible crew/equipment: When the nurse tells BJ that they're having a problem with Rice using his sales pitch in post-op, just as the nurse and BJ start walking over to Rice we can see the curved chalk foot mark on the floor.
Communication Breakdown - S10-E6
Visible crew/equipment: While Colonel Potter and Margaret are with Charles, a nurse sees them and announces the presence of a newspaper, then when everyone gathers around Charles while he sets the reading rules, there's a man with blondish shoulder length hair and a beard, wearing a blue button down shirt and white pants who's standing in the background, partially hidden by the signpost.
Visible crew/equipment: At the start, when Colonel Potter walks into post-op to tell Margaret and Hawkeye about the fresh eggs, just as Hawkeye stands up the boom mic can be seen at the top of the screen, before the camera adjusts to the proper height.
Follies of the Living - Concerns of the Dead - S10-E10
Visible crew/equipment: When Klinger wakes up in post-op, Margaret, Hawkeye, and BJ are happy he's awake, and in Klinger's first close-up when he asks about Weston the shadow of the boom mic can be seen at the top left corner of the screen, and in his second close-up a bit of that shadow is still noticeable as it moves out of shot.
Visible crew/equipment: While Major Burnham watches everyone at work in the OR, just as Charles says, "If you'd care to step over here, Major," the boom mic dips into view at the top left side of the screen.
Visible crew/equipment: When Marina arrives in the chopper with the wounded, the array lighting rig is reflected on the chopper's windshield.
Visible crew/equipment: When Father Mulcahy and the farmer are talking to BJ and Hawkeye about the wounded cow, the doctors say they'll get help from Colonel Potter, and when they walk away the T-mark can be seen on the ground where they were standing.
Visible crew/equipment: While Hawkeye's being questioned by the prosecuting counsel, we can see the curved chalk foot marks on the floor right behind Hawkeye's chair, such as when council asks where Hawkeye was when the camera was stolen.
Visible crew/equipment: While Colonel Potter, Margaret, and Father Mulcahy are in the mess tent, we see that BJ and Hawkeye arrive back at camp in the jeep, and when they walk into the mess tent the curved chalk foot marks can be seen on the floor under the table, between Potter and Mulcahy.
Visible crew/equipment: When a very tired Hawkeye's in post-op checking on Marina in the morning, the shadow of the boom mic can be seen on the window curtain at the top, right corner of the screen.
Visible crew/equipment: After the troupe's performance in post-op, when it cuts to Brandy in Margaret's tent we can see the boom mic dipping into view at the top, right corner of the screen.
Visible crew/equipment: In the kitchen, as Klinger and Winchester banter back and forth, the shadow of the boom mike can be seen in the upper right corner of the shot.
Visible crew/equipment: In the scene following BJ's shower, when Hawkeye and BJ enter their tent, you can see the tip of the boom mic drop for a couple seconds.
Answer: Even an Army field hospital would have SOME weapons for self-defense if the enemy attacked. What's meant is that it's not a combat outfit, and therefore wouldn't have enough weapons to actually attack anyone. (It's also mentioned a few times that the Officer of the Watch is supposed to carry a pistol at all times, but Hawkeye refuses to do it when he's in charge and Colonels Blake and Potter don't enforce the rule).
Captain Defenestrator