1. Sandbar or Barrier Bar: This is a long, narrow, submerged or exposed ridge of sand, gravel, or other sediment, built up by waves and currents.
* Sandbar: These form in shallow water areas, often near the coast, and can be a hazard to navigation.
* Barrier Bar: These are larger sandbars that are fully exposed at low tide and can create lagoons or inlets behind them.
2. Barometric Pressure: This is a measure of the pressure exerted by the weight of the atmosphere. It's an important factor in weather patterns, as areas of high pressure are usually associated with clear skies and calm weather, while areas of low pressure are often associated with storms.
3. Elevation Bar: This is a contour line on a map that connects points of equal elevation above sea level.
4. Chart Bar: This refers to a bar graph on a nautical chart that represents the depth of the water at various locations.
5. Wind Bar: This is a local wind pattern that is often found near a mountain range or a coastline.
6. River Bar: This is a sand or gravel deposit in the middle of a river, which can create islands or change the flow of the river.
To understand which definition of "bar" is being used, it's important to consider the context of the discussion.