(i) It is in free verse. There is no rhyme scheme at all.
Set the line-endings side by side and the absence of pattern is plain: hear – hues – streets – precision – lives – sea – home – else – hear. Nothing rhymes with anything. Nor is there a regular metre; the lines simply run to the length the sense needs, and the poem is not divided into stanzas. What holds it together instead is repetition — of a sentence pattern, of the word ‘celebrating’, and of the first line at the end.
(ii) The uneven line lengths make the poem sound like a real, unrehearsed catalogue of voices rather than a composed song — and they let the poet give each vocation exactly as much room as it needs.
Compare two lines:
“The boatmen gathering their nets from the shore, sailing, and singing while at work, return to tell the tales of life at sea,” — long and rolling: gathering, sailing, singing and returning are all carried in one breath, like a voyage
Three effects follow. The variation stops any sing-song rhythm from forming, so the poem keeps the movement of ordinary speech. It suggests variety itself — the poem’s whole subject is that vocations are ‘varied’, and lines of different lengths enact that. And it makes the short opening and closing line stand out sharply from the long body of the poem, framing it.
(iii) Most lines follow one repeated structure:
“The carpenters celebrating; they create anything out of wood…”, “The electricians humming; they get ready for work…”, “The boatmen gathering their nets…”, “The shoemakers affirming the quality of their work…”. This is parallelism, with the repeated ‘The’ at the start of successive lines making it anaphora as well.