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 - Tuning-Up Your Tractor: Plugs & Compression Testing - by Curtis Von Fange. The engine seems to run rough. In the exhaust you can hear an occasion 'poofing' sound like somethings not firing on all cylinders. Under loaded conditions the tractor seems to lack power and it belches black smoke out of the exhaust. For some reason it just doesn't want to start up without cranking and cranking the starter. All these conditions can be signals that your unit is in need of a tune up. Ok, so what is involved in a tune up? You say, swap plugs and file the points....now tha
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