It shows depths of water and navigation routes, including islands and Coastlines.
water depths and navigational routes
Such a map is commonly known as a nautical chart.
a physical map
when a pilot use a nautical map they can see what place they are going to.
The Mercator projection is the standard for nautical navigation.
water depths and navigational routes
Marine Chart or Nautical Chart.
Nautical chart
Such a map is commonly known as a nautical chart.
a physical map
when a pilot use a nautical map they can see what place they are going to.
navigation on water.
See related link for a star map
Water depth.
according to my map, its about 3 inches
Use a chart not a map. WGS 84 is probably the best datum
The word nautical miles are frequently used by mariners, seafarers, a measure of distance on a geographic map and standard of measure S.I.