3.0 Aircraft Operational Data

  3.1 In addition to the data covered by paragraph 2.3 above, it is essential that vessels are provided with means of ascertaining and reporting at any time:

• .1 the wind speed and direction using aviation approved equipment to ICAO standard;

• .2 the air temperature;

• .3 the barometric pressure using aviation approved equipment to ICAO standard;

• .4 the visibility, cloud base and cover; and

• .5 the sea state.

  3.2 Air temperature and barometric pressure should be measured by conventional instruments approved to ICAO standards. An indication of wind speed and direction will be provided visually to the pilot by the provision of a windsock coloured so as to give maximum contrast with the background. However, for recording purposes, an anemometer positioned in an unrestricted airflow is required. A second anemometer, located at a suitable height and position can give useful information on wind velocity at hover height over the helicopter landing area in the event of turbulent or deflected airflows over the deck. Visibility, cloud conditions, and sea state will normally be assessed by visual observations.

  3.3 Measuring instruments used to provide the data listed in paragraph 3.1 above should be periodically calibrated in accordance with the manufacturer's recommendations in order to provide continuing accuracy.