초록 ▼

A speedometer unit that uses a standard output of a position determining navigation unit such as a LORAN, GPS, SAT/NAV, OMEGA, or other type navigation unit. The speedometer includes a processor, such as a conventional microprocessor, that has an input for receiving speed information from the naviga

A speedometer unit that uses a standard output of a position determining navigation unit such as a LORAN, GPS, SAT/NAV, OMEGA, or other type navigation unit. The speedometer includes a processor, such as a conventional microprocessor, that has an input for receiving speed information from the navigation unit, which speed information preferably is outputted according to the National Marine Electronics Association (NMEA) 0183 interface standard. The speed information, which according to such standard is outputted in knots per hour, may be converted to miles per hour for display on an analog or digital display disposed in a housing containing the processor. A push button switch or other input device may be provided for controlling an operational mode of the speedometer, for selecting the information displayed on the display and/or for resetting the speedometer.

대표청구항 ▼

1. A marine speedometer unit for use with a marine navigation unit that repetitively provides a coded signal indicating calculated speed, comprising a housing suitably configured for mounting on an operating panel of a boat; an indicator located at a face of the housing for displaying boat speed; an

1. A marine speedometer unit for use with a marine navigation unit that repetitively provides a coded signal indicating calculated speed, comprising a housing suitably configured for mounting on an operating panel of a boat; an indicator located at a face of the housing for displaying boat speed; and a processor located in the housing, the processor having an output connected to the indicator and an input for receiving the coded signal from the navigation unit, and the processor being operative to monitor and process the coded signal for display of the calculated speed on the indicator, wherein the processor converts the calculated speed from knots per hour to miles per hour.