An umiak built correctly could carry a hunting crew, navigate through sea ice, and sustain Arctic communities in environments where no other vessel could effectively operate.

It was a technology refined over millennia, incorporating detailed knowledge of materials — which animal skins were most water-resistant, how to stretch and sew them without seams that would leak, how to size the frame for the specific uses intended.

Ada Blackjack had not been taught to build umiaks.

But she had been trained as a seamstress, and the core skill of sewing — the ability to work with needle, thread, and skin to produce strong, tight, waterproof seams — was something she possessed at a high level.

The frame construction drew on basic woodworking logic.