OMC-131 True wind display
Users’ manual
V1.14
Page 4
TDC-April-2017
1. General
The Observator Instruments OMC-131 True wind display unit is specially designed for easily read out
of true and relative wind information on board sea going vessels. Once again the use of the latest
Observator Instruments standards in combination with a distinguished front panel, known from earlier
released wind displays like OMC-139, the unit will be a breakthrough in the marine navigation market.
The unit is suitable for panel mounting as well for mounting into a standard 19" rack, on request a
table top version is also available. Any inclination is allowed and no additional control units are
required.
For proper use, this unit requires, besides a wind speed and direction signal, a GPS, Gyro and
speed log signals. These are necessary for calculating true wind and direction for normal situations
as well as situations such as turning at low speeds.
Relative wind direction and variation is indicated within a circle relative to the longitudinal axis of the
vessel, while the true wind information is displayed within a wind circle with the four wind directions.
Inside these circles which consist of 36 LEDs, numeric displays indicates the corresponding rela- tive
and true wind speed. This information can be displayed in m/s, knots, mph, km/h or Beaufort.
Selection of these units can easily made using the MENU option within the integrated membrane
keys. Another MENU option is the choice of the averaging interval, which can be set at 2 minutes,
10 minutes or every other user-programmed interval. When not in the MENU mode the arrow
keys are used for brightness control or gust reset.
A gust display is located in the lower right of the relative wind circle. It will display the maximum gust over
the selected interval time or -
when the interval is set to ‘user’ - the maximum since last reset.
The minimum gust is not selectable since it is not implemented in this firmware.
On the lower right of the true wind circle a 3 digit display is available for indication of the numeric
wind direction.
The true wind display unit was specially developed for integration within meteorological systems
used for nautical applications. Therefore many in- and output connections belong to the possibilities,
either as standard or as option. The unit was primary intended to use with the Observator
Instruments OMC-160 wind sensors, but other, most common sensors can be connected to the
system.
Of course the connection with all other Observator Instruments equipment like meteorological
data monitoring software, data printers and
’slave’ display units belong to the possibilities using
the Observator Instruments standard output.
