The waves are rising higher and higher. You can hear the thunderclaps over all around you and the grayness of the dusk is broken by flashes of lightening. It was bright and sunny when you had set out for your marine adventure and you had no inkling of the tricks Mother Nature was going to play with you. You have lost all sense of direction and do not know your way. While you have every reason to feel worried, you should be happy that you had the foresight to carry your portable marine gps phone with you.
All gps systems work in the same way. The global positioning system, assisted by a chain of satellites transmitting accurate radio signals in the microwave range, enables a GPS compatible receiver to know its exact location. These satellites are stationed in a geo-stationary orbit, 35,000 kilometers above the earth. It is assumed that you have a decent working idea about your portable marine gps. At the moment the gps is the sole & totally operational GNSS (Global Navigation Satellite System). However there are some countries that are coming out with similar systems.
Way back in 1983 a Korean Air Lines plane was shot down by US Military jets. Following this incident, the then president of the USA, Mr. Ronald Reagan had directed that these services of these gps systems should be made available to the public too. Prior to this only the Defense system of the USA had access to the Global Positioning System. Now with the assistance of the gps, you can be assured that the portable marine gps that you have with you will pull you out of this mess.
The portable marine gps is designed keeping you, the marine adventurer, in mind. These gps come with a inbuilt memory, sufficient for your general navigation maps. They have their inbuilt navigation software which is loaded with a huge database of rivers, lakes and waterways. General marine landmarks like buoys are also inbuilt into it. You can use this instrument to find the location of the nearest lighthouse. In case you have lost your direction, these mini-marvels will help you to get back on path with their NorthFinder technology.
You can add more memory in the form of flash memory cards. The extra memory comes handy when you want to add more marine maps. The portable marine gps instruments also let you view the latitude & longitude of your current location. It can also help you to determine the speed of your ship in knots per hour. Since these instruments use the atomic clocks of the satellites, knowing the exact time is no problem either. Designed for use in ships, these marine gps instruments are waterproof too.
Gps
