Walker 7070 is a new integrated Speed Log, Wind and Weather Data System providing both electromagnetic log and relative wind data with a true wind option from a single processor. The new weather data functions include measurement of barometric pressure, air temperature and humidity by sensors housed in a single tower and water temperature via a sensor installed in a cooling water inlet pipe.
This compact system takes advantage of 'state of the art' electronics to process log, wind and weather sensor inputs, outputting digital data on a single NMEA 0183 data bus to DIN 144 data displays. The log is designed for vessels above 500GRT offering both forward and astern speed, with ranges from 0 to 80 knots full scale. It is suitable for vessels varying from patrol boats and ferries to liners and bulk carriers. The anemometer cup unit transducer uses a LED/phototransistor module, which allows exceptionally low start speed of 2½ knots of wind to be achieved. The vane unit transducer provides full 360-degree transmission, and may easily be rotated on its base in order to align to Ships Head. The indication of wind direction is by digital and 'analogue' displays.