4 - Indicator figure for pressure group
PPPP - Pressure in hPa (millibars) and tenths
Only initial 1 is omitted
e.g.
998.6 hPa is coded 9986
1014.7 hPa is coded 0147
Notes
- The hectopascal (hPa)
is numerically equivalent to the millibar (mb)
- Because Auxiliary ships are not equipped with tested instruments permitting the
determination of tenths of hPa of pressure, a solidus (/) should be coded for the tenths of
hPa.