Regulation (EU) 2018/395

Balloons operated under VFR by day shall be equipped with both of the following:

1. a means of displaying drift direction;
2. a means of measuring and displaying:
   1. time in hours, minutes and seconds;
   2. vertical speed, if required by the AFM; and
   3. pressure altitude, if required by the AFM, when required by airspace requirements or when the altitude needs to be known for the use of oxygen.

ED Decision 2018/004/R

The drift direction may be determined by using a map and reference to visual landmarks.

ED Decision 2018/004/R

A means of measuring and displaying the time in hours, minutes and seconds may be a wristwatch capable of the same functions.

ED Decision 2018/004/R

A means of measuring and displaying pressure altitude is needed when required by air traffic control or when altitude needs to be checked for flights where oxygen is used, or the limitations in the AFM require to limit altitude or rate of climb or descent.

BOP.BAS.320 Restraint systems