they are restricted by surveying the length in nautical miles.

Answered by Renuka , an ibibo Advisor, at 3:08 PM on February 05, 2009

First 12 nautical miles area from the coast is known as territorial waters of a country, next 12 nautical miles are known as contiguous zone, the next 200 miles are known as exclusive economic zone. Only after that the real international waters start. There is no visible line of demarcation to the passengers in a ship to show that they are travelling in territorial waters or international waters.

Answered by Niraimathi , an ibibo Master, at 6:46 AM on February 04, 2009

When the ship sails...it uses maritime international maps...through which they chart the course. Now a days bigger/newer ships have computerised navigation system.

Answered by Keshto Patel , an ibibo Master, at 6:19 PM on February 02, 2009

Any ship sailing in the sea or ocean enters international waters 12 nautical miles after leaving shoreline of any country.
In other words if you are leaving the coast of India the boundary exists only upto 12 nautical miles after which you are in international waters.

Answered by murli dhar , an ibibo Citizen, at 2:35 PM on February 02, 2009

this is decided by the international treaties,so learn that stuff

Answered by Riti , an ibibo Citizen, at 1:17 PM on February 02, 2009