Continuity mistake: In the dining room, after the ship has turned over, Scott tells Mrs. Rogo she has to take off her gown because she can't climb in it. Mr. Rogo says "she's got nothin' on under it." To which she answers, "Panties, what else do I need?" She changes into her husband's shirt. However, when they are climbing through the ventilation shaft, just before she gets onto the ladder, she's wearing a bra.
Suggested correction: Clearly she was referring to what was covering her bottom half, as the shirt would cover the top half.
Not quite sure about the accuracy in that response... if responding to the bottom half only, Rev. Scott would not have jumped at the shirt idea so quickly. When being told "just panties" it told the Reverend that she most likely was topless and also why Mr. Rogo got angry about taking the gown off in general. If a bra was on her, Mr. Rogo most likely wouldn't have blown up like that.