PART II

Meteorological Ineokmation.

Information respecting weather, &c., is given by four groups of five figures each. These groups are preceded by the word " weather."

First Group {DDPPP) :

The day of the month : two figures (DD), according to Code I.

The position of the shi]) when transmitting the message, indicated by three figures (PPP), representing the 1° square in which the ship is situated, according to Code IV and the numbered chart annexed to this Article.

Second Group (WWCCX) :

Wind direction and force, at 8 a.m. at the 7.5th meridian of west longitude : two figures ( W 1 V) , acc( )rding to Code V.

Set and velocity of current : two figures (CO), according to Code VI.

Weather or state of the sky at the same hour : one figure {X), according to Code VII.

Third Group (BBBAA) :

The barometric height to tenths of a millimetre, at S a.m. at the 75th meridian of west longitude : three figures (BBJJ), according to Code VIII.

Air temperature at the same hour : two figures {A A), according to Code IX.

Fourth Group (bbSSS) :

Bai'ometric tendency, at S a.m. at the 7ôth meridian of west longitude : two figures (6i), according to Code X.

Sea surface temperature at the same hour : three figures (SSS), according to Code XI.

Codes.

Code IV. Position of Ship.

The chart* annexed to this Article gives the numbers to be assigned to eacli 1° square in the North Atlantic. The position of the ship, when the meteorological data given in Fart II were observed, is indicated by the three figures representing the 1° square in which the ship is situated. For example : — A position 51° 55' N., 26° 49' W. would be reported as 561.

* See opposite page 28 (French text).

Code V.

Wind Direction (to IG points) and Wind Force, at 8 a.m. mean time at the 75th meridian of west longitude {WW).

Wind

Force,

Beaufort

Scale.

Calm

Light breeze ...

l,2,or.^

Moderate breeze

■4 or .')

Strong wind ...

6 or 7

If)

Gale force

8 or '.)