Zhubov scale explained

The Zhubov scale is a way of reporting polar sea ice coverage.^{[1] [2]}

It was developed in the former USSR by Russian naval officer N. N. Zhubov (1895 - 1960) as a way for Soviet officers to describe ice coverage.^{[3] [4]}

The Zhubov scale is measured by using the unit ball, one ball equals 10% coverage, five balls 50% coverage and so on, with a total of ten unit balls being possible.^{[4] [2]}

Notes and References

1. Book: Joseph, Christopher . How to Measure Anything . Ivy Press . London . 40 . 2022-04-12 . 978-0-7112-6803-6 .
2. Book: Jerrard, H. G. . A Dictionary of Scientific Units . Springer Science & Business Media . 2013-03-09 . 978-94-017-0571-4 . 165.
3. Book: Fairhall, David . Russian Sea Power . Boston : Gambit . Boston . 37 . 1971 . 978-0-87645-040-6.
4. Book: Gyllenbok, Jan . Encyclopaedia of Historical Metrology, Weights, and Measures . Birkhäuser . Cham . 237 . 2018-04-11 . 978-3-319-57598-8.