In this sentence,
"we will be sending a small crew of around twenty hands on this long-range vessel,"
Does the use of hands refer literally to each individual's set of two hands (making the crew numbered to ten, instead of the desired twenty), or does the use of a hand refer to a single individual regardless of the number of hands that they personally have?
Edit: so it was made clear to me that I must present my research to be admittable for assistance here. Upon searching the internet, most sites referred me to the phrase "all hands on deck," which means all men (as individuals) to attend their stations. This answer is all fine and dandy, sort of. It shows me that hands is referring to head count rather than hand count.
However, English has many quirks to it, and I want to be sure this isn't one of them. Most folks on here seem to know a thing or two that I don't, and so I, and possibly others, find it useful to differ to their knowledge, even when I feel in a state of certitude with my own evaluations.

closed as off-topic by tchrist Jan 19 '18 at 4:45

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    Please try a few dictionaries before asking here. Such as Merriam Webster online, definition 10c. We expect you to explain your previous research and what isn't clear about it. – Phil Sweet Jan 19 '18 at 3:30
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    @PhilSweet Frankly, I knew that site existed, I just never explored it for reliability. The link alone did however answer the question, so thank you. On a side note, I never realized how many uses a "hand" could have. – B.fox Jan 19 '18 at 3:45
  • @B.fox M-W is sparse and spartan when it comes to hand. For the noun alone, the (paywalled) OED has 25 main senses, scores of subsenses, and upwards of a hundred or more phrases. I stopped counting.:) Yours is sense 14b. – tchrist Jan 19 '18 at 4:23