When applying a dip correction to the sighted sextant angle (hs), you always subtract the dip because you are correcting __________.

Correct Answer: Option C — hs to the sensible horizon

Dip is the angular depression of the visible sea horizon below the true sensible (horizontal) plane due to the observer's height of eye ($Dip \approx 0.97 \times \sqrt{Height\ in\ feet}$). Dip is always subtracted from the sextant reading.