The sea level on the West Coast of North America is usually about 8 inches higher than the sea level on the East Coast of North America. The surface of the ocean and its seas varies from place to place and from minute to minute based on many different factors. Local sea level can fluctuate because of high or low air pressure, storms, high and low tides, and snow melt, rainfall and river flow into the oceans (as part of the ongoing hydrologic cycle).
The standard "mean sea level" around the world is usually based on 19 years of data that average out hourly readings of the seal level around the world. Because mean sea level is averaged around the world, using a GPS even near the ocean can result in confusing elevation data (i.e. you might be on a beach but your GPS or mapping app indicates an elevation of 100 feet or more). Again, the height of the local ocean can vary from the global average.
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Today's Featured Article - Hydraulics - Cylinder Anatomy - by Curtis von Fange. Let’s make one more addition to our series on hydraulics. I’ve noticed a few questions in the comment section that could pertain to hydraulic cylinders so I thought we could take a short look at this real workhorse of the circuit. Cylinders are the reason for the hydraulic circuit. They take the fluid power delivered from the pump and magically change it into mechanical power. There are many types of cylinders that one might run across on a farm scenario. Each one could take a chapter in
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