Ship Meteorology 4 Questions Ask question Search Order By: NewTagClear Filter Why do we need to record weather observations at sea? What is surface wind and what factors affect surface wind? What could be wrong if at watch between 0400-0800 in English Channel, the barometer reading falls down too quickly & Why this may happen in English Channel ? What is the significance of hygrometer and When do we use ventilation with regards to steel cargo ? What should we do when humidity is 100 % ?