212920-1934-Supplementary-Notice-to-Mariners — Page 8

674

Table IX.

In 2 hours.

In 3 hours.

In 4 hours.

Code Figure.

Barometer steady-Has not risen

or fallen more than

0.3 mb. (.01 in)

0.5 mb.

(.01 in)

0.7 mb. (.02 in)

Barometer

rising

slowly-Has

0.7-1.0 mb.

1.0-1.5 mb.

1.3-2.0 mb.

1

risen

(.02-.03 in)

(.03-.05 in)

(.01-.06 in)

Barometer rising-Has risen

1.4-2.4 mb. (.05-.07 in)

2.0-3.5 mb. (.06-.10 in)

2.8-4.8 mb.

(.08-.14 in)

Barometer rising quickly-Has

risen

2.6-4.0 mb. (.08-.12 in)

4.0-6.0 mb. (.12-.18 in)

5.2-8.0 mb.

3

(.15-.24 in)

Barometer rising very rapidly-

Has risen

over 4.0 mb.

over 6.0 mb.

over 8.0 mb.

(,, .12 in) |

(„,

.18 in) .18 in)

|

(

(,, .24 in)

Barometer falling slowly-Has 0.7-1.0 mb.

1.0-1.5 mb.

1.3-2.0 mb.

5

fallen

(.02-.03 in)

(.03-.05 in)

(.04-.06 in)

Barometer falling - Has fallen

1.4-2.4 mb.

2.0-3.5 mb.

2.8-4.8 mb.

(.05-.07 in)

(.06-.10 in)

(.08-.14 in)

Barometer falling quickly-Has

fallen

2.6-4.0 mb. (08-12 in)

4.0-6.0 mb.

5.2-8.0 mb.

(12-18 in)

(.15-.24 in)

Barometer falling very rapidly-

Has fallen

over 4.0 mb.

.12 in) | („,

over 6.0 mb.

.18 in) |

over 8.0 mb.

(,,

.24 in)

(The change in 3 hours should be given if possible).

Table XII.

Code Figure.

Dense fog Thick fog

Fog

Moderate fog

Objects not visible at 50 yards Objects not visible at 1 cable Objects not visible at Objects not visible at

0

1

2 cables

mile (nautical)

3

►

Objects not visible at Objects not visible at Objects not visible at Objects not visible at 10 miles (nautical) Objects not visible at 30 miles (nautical)

1 mile (nautical) 2 miles (nautical) 5 miles (nautical)

4

5

6

7

8

Mist or haze, or very

poor visibility

Poor visibility

Moderate visibility

Good visibility

Very Good visibility Excellent visibility Objects visible more than 30 miles (nautical)

•

(Further information concerning the code may be found in the Marine Observer 1934, and subsequent issues, obtainable from the Meteorological Office, London).

>>

9

for January,

C. W. JEFFRIES,

Director.

27th July, 1934.