PA.IV.G.K4FAA-S-ACS-6C · Nov 2023Knowledge
Effects of water surface.
Effects of water surface.
Bottom line
If a seaplane lands into a stiff breeze on water with small waves, it might be more difficult to leave the next morning when winds are calm and the water is glassy.
Key numbers
| Number | What it means |
|---|---|
| at least one-tenth of an inch of water | Dynamic depth |
| no more than one-thousandth of an inch | Viscous depth |
| can persist to 20 knots or less groundspeed | Reverted rubber |
FAA references
- SEA ch. 6 (p. 6-8) — FAA-H-8083-23
- AFH ch. 9 (pp. 9-37–9-38) — FAA-H-8083-3C
- SEA ch. 5 (p. 5-1) — FAA-H-8083-23
- PHAK ch. 11 (p. 11-13) — FAA-H-8083-25C (2023)
- RMH ch. 3 (p. 3-7) — FAA-H-8083-2A
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