working chart of the compass age
Mare Vellum
north rose ledger
folio xv · vellum index
catalan school

Rhumbs Rule the Sea

Red, green, and iron-gall bearings radiate from gilded roses over sea-darkened vellum.

black principal winds hold the coast and the border.
green half-winds cross the field with a quieter hand.
red quarter winds mark rank, warning, and named ports.

Copied for a fictional pilot house, then ruled for the screen as one brown-tan sheet.

N rose Porta Rossa San Vento Aurum Quay Cape Ledger inked bearing circle gilded wind rose
Radial Order Compass roses, not Cartesian grids, govern the sheet.
Vellum Field Warm brown surface holds stain, border, and ruled edge.
Port Hand Red names rotate like coast marks beside the line.
This is the Portolan Rhumb Chart design system, applied by Curio Design — a design-style library for AI agents. Full Portolan Rhumb Chart guide → designbycurio.com/learn/portolan-chart-rhumb-1450