the.com/jetsam

What you throw overboard to save the ship — survival's version of letting go.

means Goods or wreckage deliberately thrown overboard from a ship (and that may wash ashore), as distinct from flotsam, which sinks or floats off by accident.

from Short for 'jetson' or 'jettison,' which traces back to Latin 'iactare,' to throw or hurl repeatedly — the same root behind 'jet' and 'eject.' Old maritime law actually leaned on the jetsam/flotsam distinction: jetsam was cargo cast off on purpose to lighten a sinking ship, flotsam was whatever debris simply floated free on its own, and who got to claim washed-up goods often depended on which word applied.

vs flotsam
jetsam is thrown deliberately, flotsam just drifts
etymology
shortened from jettison, same root as jet
maritime law
ownership rules differ for each, courts actually care
idiom use
flotsam and jetsam now means random discarded stuff
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