Table S4.

Simulated directed voyages: First semester

Crossing	AWS	January	February	March	April	May	June
Samoa–Marquesas	1	0%	18% (78–79) [78]	0%	82% (89–103) [94]	35% (94–106) [95]	5% (107–113) [111]
Samoa–Society Islands	1	6% (64–69) [67]	5% (67–68) [68]	0%	67% (73–167) [98]	25% (73–117) [97]	9% (131–186) [144]
Marquesas–Hawai'i	2.5	0%	0%	0%	0%	0%	0%
Marquesas–Hawai'i	3	0%	0%	0%	0%	0%	0%
Society Islands–Hawai'i	2.5	7% (50–64) [59]	12% (51–63) [60]	0%	2% (55–64) [60]	1% [51]	3% (49–61) [54]
Mangareva–Easter	1	92% (45–181) [65]	0%	0%	45% (47–82) [61]	0%	0%
Marquesas–Easter	1	6% (89–94) [92]	0%	0%	0%	0%	0%
Society Islands–Easter	1	13% (89–92) [90]	0%	0%	0%	0%	0%
Society Islands–New Zealand	2	27% (26–62) [34]	13% (24–49) [32]	21% (28–50) [36]	14% (31–65) [44]	10% (39–101) [55]	3% (49–76) [63]

Crossing, starting point, and destination; HS, minimum headway speeds allowed by simulation. Month columns as in Table S1.