At sea, air pressure is your earliest warning system. A falling line on the barograph tells you hours in advance what the horizon still conceals. The Wempe Drum Barograph has proven its worth on board countless ships – not as a gadget, but as a silent companion that never sleeps. A new sheet of paper every week, every line a story of wind, water, and changing weather. This is the instrument experienced sailors trust when the sky starts to lie. The WEMPE drum barograph (265 x 170 x 175 mm) weighs 3100 grams and comes with a writing pen and 52 diagram papers (hPa or inches), one for each week of the year.