All 7 Uses of

muster
in
Moby Dick

I have mustered ye all round this capstan; and ye mates, flank me with your lances; and ye harpooneers, stand there with your irons; and ye, stout mariners, ring me in, that I may in some sort revive a noble custom of my fisherman fathers before me.†
Chpt 34-36

mustered = gathered

They generally are of two sorts; those composed almost entirely of females, and those mustering none but young vigorous males, or bulls, as they are familiarly designated.†
Chpt 88-90

mustering = gathering

Now, mustering the spare poles from below, and selecting one of hickory, with the bark still investing it, Ahab fitted the end to the socket of the iron.†
Chpt 112-114 *

Definitions:

(1) (muster as in: muster strength or the crew)
to gather
The exact meaning of this sense of muster is often subject to its context. For example:
- "mustered her courage/strength/a smile" -- to gather from within
- "muster the soldiers/crew" -- to gather -- typically for inspection
- "muster volunteers/votes" -- to gather enough to do something
(2) (muster as in: didn't pass muster)
inspection -- especially of soldiers or a crew
(3) (meaning too rare to warrant focus)
meaning too rare to warrant focus:

More rarely, muster can refer to a counting or census. Much more rarely, muster can refer to a call to duty such as compulsory military service or jury duty. In that sense, you may see the expression muster in or muster out. Still more rarely, a muster can refer to a group of peacocks.