Patchwork Isles

1. Paint a scrap. Twelve squares by twelve, in seven fabrics: indigo deep sea, chambray shallows, calico sand, gingham meadow, knotted forest, tweed rock and madder harbours. Or borrow one of the four ready scraps.
2. Sew the chart. The loom cuts your scrap into every 2×2 or 3×3 piece it holds (turned and mirrored if you allow it), then sews a 72×48 sea where every overlap matches a piece it has seen. When it sews itself into a corner it ties a knot, unpicks and starts again. The Admiralty loom works from fixed coastline pieces instead.
3. Set sail. Call at every harbour before the season ends. Stores run down by the day, and any harbour fills the hold and pencils more ports onto your chart. The fog lifts wherever you sail.

Wind and water

The pennant points downwind. Sailing across the wind is fastest. Close-hauled is slow, and dead into the wind you barely move, so tack, or lower the sail and row. Shallows slow you down. Shoals beside rocks (red crosses) ground a boat under full sail, so cross them at half sail. Running ashore at speed costs you hours.

Controls

Scoring

120 for each harbour, 3 for every percent of the chart you reveal, and if you call at them all, 250 for the homecoming plus 40 for every day to spare.