Mean height and period of sea waves observed once in 5 years in January, April, June and October

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 years
Mean height and period of sea waves observed once in 5 years in January
Mean height and period of sea waves observed once in 5 years in April
Mean height and period of sea waves observed once in 5 years in June
Mean height and period of sea waves observed once in 5 years in October