Unlock and locations

Install the Mailbox at Albert (250 Glims, 8 Maple Planks, 8 Linen Thread, 4 Lightning in a Bottle) and read the letter directing you to Bottom Line Corp. (137, 59). Recruit Astrid there by following the strike encounter and manager dialogue. “Three Sisters” introduces Olga. Continue Astrid’s turtle storyline and open the required sea regions for the other sisters.

Olga: (81, 28), no special sea barrier. Masha: (-91, 138), Icebreaker required. Irina: (127, -76), Rock Destroyer required. A sister being outside the currently accessible region is a ship-progression issue, not a reason to look for a special resource-copy skill.

Plant, return and harvest

Each turtle has three resource plots. Plant one eligible resource in each plot, speak to the sister and leave so she can dive and grow it. Return when her map marker shows that the resources are ready; allow a couple of in-game days rather than expecting an immediate harvest. Harvest the multiplied nodes/trees and plant new inputs to repeat.

Eligible groups include wood (Maple, Oak, Pine, Ash), minerals (Limestone, Quartz, Coal, Slate, Marble) and ordinary ores (Copper, Iron, Aluminum, Zinc, Silver, Gold). Pulsar Ore and Comet Rocks are excluded from the list of plantable resources. Bring raw Ore or Logs rather than processed Ingots/Planks. This is a replenishment route once you own the first input, not a way to create an undiscovered resource from nothing.