While passing Shepard in the companionway, Chief Prosser says, "Listen, Grace," and tells her the offenders are on a week's latrine duty. "I just hope you understand it's not about you being a woman," he patronizes. She figures she hasn't earned their respect yet. "Well..." he murmurs avuncularly, until she snaps that it's going to be two weeks of latrine duty, plus the COB is going to quit with that "Grace" shit. Sure, Chaplin calls her Grace, but he's the captain. He can call her anything he wants as long as he's not using the word "rack."
Later, on the conn, Chaplin asks Shepard for a position report. Watching the screen, she says they're just now crossing the Equator. And a moment later, "La Bamba" is blasting over the speakers throughout the boat while the conn officers get up and dance. In fact, there seems to be a similar party going on all over the sub, except for first-timer and wallflower Shepard. Crossing the Equator's kind of a big deal, apparently. After Cortez rolls in and pops a pair of Ray-Bans on Chaplin's grinning face, Kendal appears in the companionway and the two senior officers exchange a heartfelt salute across the room. Which just lends even more poignancy to the heartfelt lyrics, "Yo no soy marinero, soy capitán, soy capitán, soy capitán." I am not a sailor, I am the captain. Tears, I'm getting.