Profile: Precision Navigation Ltd. supplies and installs marine electronic equipment, electrics and technical on-board equipment. We can provide a professional and exacting level of service. Our Yeoman chart plotter is ideal for family cruising yachts, long distance sailing, racing and motorboating & saves time. Taking data from GPS, it senses its position as we move it over a chart. We provide NMEA 0183, which is the current standard providing simple two wire connection between instruments, allowing them to send messages to each other as short, low-voltage electrical pulses - a kind of electronic morse code.