Sat Nav fish finder systems are widely used by sailors to measure the depth of water and to assess availability of fish or other objects of interest under water. It is de facto a refined version of SONAR which is also used for the same purpose. The term SONAR stands for Sound Navigation and Ranging. Another device used in the process of marine navigation is chartploter. It is a combination of Global Positioning System (GPS) and digital technology. An electronic chartploter will be provided to the user.
In medium and small sized boats electronic navigational charts are used. In all these devices memory cards will be used with GPS units for accessibility to under water situations. Modern Sat Nav fish finders provide valuable information to the user by connecting to the satellites.
There are many types of Sat Nav fish finders available today. The modern sophisticated fish finders have effected qualitative and quantitative changes in fishing or marine expeditions. Precise information is made available to the onboard personnel through transducers which convert satellite signals into useful data. Such data will be displayed on the monitors. Modern fish finders come with dual beam transducers to suit the varied requirements of both shallow and deep water fishing activities. Both recreational and commercial fishing are benefited by the data provided by the system. It is equipped with colour display screens to make data visible even in the darkness. Digital screens are provided with capability to detect fish in deepest waters. Transducer cables floats will prevent it from getting damaged when submerged in water.
Fishing has become an enjoyable exercise with satellite navigation based on global positioning system. With evolving technology and the advent of innumerable models of products in the markets, Sat Nav fish finder has become affordable to every one who indulges in sailing either for recreation or for commercial fishing. Ultra modern and sophisticated Sat Nav fish finder enables even lay persons without previous experience to venture into fishing expeditions. Commercial fishing has become not only safer but also economical thanks to the Sat Nav fish finders. The device is now considered as an inseparable companion for those who venture into the deep seas. It should be remembered that the World Health Organisation has described fishing as one of the most dangerous professions in the world. Satellite based information and communication could minimize the hazards faced by fishing community through out the world.