the 3 mile limit is the name of the boundary that separates the territorial waters of most coastal states & territories from the federal territorial seas that enclose them
but in the cases of Texas & Puerto Rico & the gulf coast of Florida it is called the 3 league limit or 9 mile limit
8891 kms
the equator...... i think
It's there to show that your crossing into a different country's territory.
water
The Atlantic Ocean.
The Northern Atlantic
Lake Erie
That would be the Rio Grande river.
black sea
black sea
No body of water separates the US. from Mexico
A region of land that is without a water boundary is known as "landlocked." Some US states that are landlocked are: Colorado, Kansas, Montana, Nevada.