I've been meaning to get back to Maritime work song in general.

Which do we think came first, the end of The Spanish Inquisition or the start of The Steam Age? Hint: The Jesuits were never into WASPy maritime pop tunes. What Shall we do with the Drunken Sailor? was a question one didn't want to see answered.

One of several functions of the celeusma, saloma, shanty is cadence. Does the military make use of the cadence? Yup and, in proceleumatic terms, it's generally agreed their utililty increases with the size and diversity of the labour cohort, not the other way around. Lyrics are always optional but only if one can afford a musician.

For early martial/naval usuage of the nautical celeusma (saloma) see Polybius. It didn't begin or end there.

The Basque whaling fleet made up a very large portion of the Spanish Armada. Discinctions between military, merchant and religious practices are going to be difficult to make.