What is barograph , barogram ? what does curved lines in barogram indicate ? what enteries are to be made on barogram ?

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barograph is a instrument which record the change in atm press. onboard ship.
for more detail read met book.

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barograph is aneroid berometerwhich measuresd contonuous record of pressure on a paper chart,the barograph has  continuous trace on the chart called barogram. the curved line indicate utc are two hor interval.after completing barogram entries regarding lat,long,dates,comparison with barometer are to be filled and it is kept along with the weather log books

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the chrt in barograph is called barogram, changes in pressure are recorded without lapse in tym