Editing Openai/68acd283-ffd0-8007-a41f-aba460e3dd99 (section)

=== Assistant: Rerun for following seas at 8 kn done. ===
Rerun for following seas at 8 kn done. You’re welcome.

Here’s how to read what I just gave you:
* Encounter period (following) is based on how fast you and the waves move in the same direction: Te=1/∣1/T−V/L∣T_e = 1 / |1/T - V/L|Te=1/∣1/T−V/L∣. Longer TeT_eTe means you’re meeting fewer crests. That’s why the 4 s and 6 s cases look calmer than 2 s even though they’re bigger.
* V/c (boat speed over wave speed) flags surfing/broach potential. Values near 1.0 are spicy. At 8 kn: - 2 ft @ 2 s: V/c ≈ 1.31. You’re actually faster than these little waves, so you overtake a lot of short, steep backs. It’s busy and hand-steery. - 4 ft @ 4 s: V/c ≈ 0.66. Comfortable territory; plenty of control if you stay alert. - 6 ft @ 6 s: V/c ≈ 0.44. Easy rhythm; watch for breaking crests but the flow is friendly.
* The Following-sea Misery bar is a simple workload index that grows with steepness, encounter rate, and how close V is to c. It puts numbers to the obvious: short, fast encounters are annoying even when the waves are small.

Practical calls:
* In short 2 s following chop, at 8 kn you’re overtaking waves constantly. Expect squirrelly yaw and a tiller that won’t sit still. Easiest fix: slow a touch or change angle to reduce the overtake rate.
* In 4–6 s periods, 8 kn is fine. Trim for control, keep weight aft, and don’t chase speed down steep faces unless you actually want the sleigh ride.

If you want the same treatment for quartering or beam seas, I can spit that out too. That’s where V/c plus roll period starts making heroes or paperwork.