Mean height and period of sea waves observed once in 5, 10, 20 and 50 years

Conventions: Mean height h(m), period of sea waves t(s)
Reference: Hydrometeorology and Hydrochemistry of Seas (1992). Volume VI The Caspian Sea. Issue 1 Hydrometeorological regime. Eds. F.S. Terziev, A.N. Kosarev, A.A. Kerimov.

Mean height and period of sea waves observed once in 5, 10, 20 and 50 years
Mean height and period of sea waves observed once in 5 years
Mean height and period of sea waves observed once in 10 years
Mean height and period of sea waves observed once in 20 years
Mean height and period of sea waves observed once in 50 years