Here a simple shell pattern that makes beautiful points on the cast-on edge is combined with an ocean wave on either side. Knit from cast on edge to the center in two pieces, the halves are then grafted together, or joined with a 3-needle bind off.
For a more complicated shawl with and ocean theme see South Seas Stole.
Pacific Islands errata before pattern update released November 10, 2014.
Many, many thanks to Wendy Johnson, my wonderful test knitter for the original scarf, without whom this pattern wouldn't be the same. Thank you, Wendy!
Charts B and C only have 11 RS rows, while charts A and D have 13 RS rows. After knitting row 12 of all charts, knit row 13 of chart A, row 1 of charts B and C, and row 13 of chart D. Then, the next RS row knit row 1 of chart A, row 3 of charts B and C, row 1 of chart D. Continue in this manner per pattern instructions.