All 3 Uses of

discreet

in

Moby Dick

…in this crow's-nest, with a small compass he kept there for the purpose of counteracting the errors resulting from what is called the "local attraction" of all binnacle magnets; an error ascribable to the horizontal vicinity of the iron in the ship's planks, and in the Glacier's case, perhaps, to there having been so many broken-down blacksmiths among her crew; I say, that though the Captain is very discreet and scientific here, yet, for all his learned "binnacle deviations,"†
Chpt 34-36

But granting all this; yet, regarded discreetly and coolly, seems it not but a mad idea, this; that in the broad boundless ocean, one solitary whale, even if encountered, should be thought capable of individual recognition from his hunter, even as a white-bearded Mufti in the thronged thoroughfares of Constantinople?†
Chpt 43-45 *

They meant Queequeg's best happiness, I admit; but in their hasty zeal to befriend him, and from the circumstance that both he and the sharks were at times half hidden by the blood-muddled water, those indiscreet spades of theirs would come nearer amputating a leg than a tall.†
Chpt 70-72