ONE EARTH (hr) — 414 pre-1600 records in 160 segments; knots every 300 y, step 0.25 h, max bend 0.75 h
  conventional: 41 of 42 landing records threaded by one curve (98%)
  alias chronologies (300 draws from each segment's own aliases): mean 97%, 95th pct 98%; 5% thread at least as well as the conventional
  conventional curve δ (hours vs library ΔT): 0:-0.75, 300:-0.50, 600:-0.25, 900:+0.00, 1200:-0.25, 1500:+0.00, 1800:-0.25