>>511275013The individual collection systems could be multiplied relatively easily.
The scaling limit is still quite small though: extra vessels and capturing devices multiplies cost, and this remains a surface-level collection. There aren't concentrated veins, or so it appears in this setting.
A limited effort to collect resources that are freely sitting there is an effective and efficient use of labour.
However its quality does not undermine that the collection will be limited in scope, and can only augment efforts, never sustain them.
Though collecting all available resources then selling the vessels and capture devices to nations with similar resources in their own waters is a way to collect on the way out.