 I refused to fall down in front of my new executive officer while I still struggled to find it.  He gave me what was probably a carefully calculated amount of time to catch my breath, then said to my still-turned back, "May I remind the captain that when he is not eating, sleeping, or engaging in some necessary physical activity, he is on duty. As senior science officer, my duty shift is concurrent with the captain's. As acting executive officer, my second duty shift coincides with when the captain is off-duty. Logic therefore suggests that rather than disrupt the necessary human sleep function, the most efficient time period during which to conduct our required conferencing would be during the one