one or more sonar devices, also known as sonar fish finders or sonar depth finders, for detecting the depth of water and/or the depth or location of fish and other objects in the water; one or more devices, each known as a Global Positioning System or GPS, which is a navigation radio consisting of a receiver and a display showing location in latitude, longitude, and altitude, with or without a graphical representation of the route, steering screens, and other information pertaining to navigation, based upon information received from satellites in orbit around the earth; and one or more devices, each known as a Long Range Navigation or Loran product, which is a navigation radio consisting of a receiver and a display showing location in latitude and longitude or TD's (Time Differentials), with or without a graphical representation of the route, steering screens, and other information pertaining to navigation, based upon signals received from land-based Loran transmitters