What is the difference between weather and climate?
From NOAA We hear about weather and climate all of the time. Most of us […]
meteorology
What is the geoid?
From NOAA While we often think of the earth as a sphere, our planet is […]
What is a datum?
From NOAA A geodetic datum is an abstract coordinate system with a reference surface (such […]
What is a perigean spring tide?
From NOAA What is a perigean spring tide? A perigean spring tide occurs when […]
What is the difference between a nautical mile and a knot?
From NOAA A nautical mile measures distance and a knot measures speed. A nautical mile […]
What is a Storm Surge?
From NOAA Storm surge is the rise in seawater level caused solely by a storm. […]
What is the Mariner’s 1-2-3 Rule?
From NOAA The Mariner’s 1-2-3 Rule is the guideline mariners follow to keep out of […]
What are High Seas Forecasts?
From NOAA NOAA’s High Seas Forecasts are weather forecasts and data transmitted around the world […]
How do I get NOAA nautical charts?
From NOAA Head to the NOAA Coast Survey website for the latest charting products. NOAA’s […]
What makes a chart or map historic?
From NOAA NOAA considers a historical map or chart any map or chart that is […]