NUMBER
OF SIGNALS

SHAPE OF SYMBOLS DISPLAYED

MEANING OF SIGNAL

RECOMMENDED SAFETY PRECAUTIONS

DURING THE DAY

AT NIGHT

1

Alert signal: the centre of a tropical cyclone is less than 800 kilometers from MSAR and may later affect the MSAR

Check the safety of objects which might be carried or destroyed by the winds such as fences, scaffoldings, flower pots, antennae (aereals ), etc. Keep boats and small crafts in the nearby shelters.

3

The centre of a tropical cyclone follows a pattern of movement that winds to be experienced in MSAR may possibly range from 41 to 62 km/h and gusts about 110 km/h.

Lead ships and other sailing crafts into safety shelters or ports. Check the safety of doors and windows. Clear drains and rain collectors of obstructions. Follow bulletins broadcasted by radio, television and others electronics communications devices.

8^NW

The center of a tropical cyclone is nearing and winds recorded in MSAR, from the quarter indicated, may possibly range from 63 to 117 km/h with gusts reaching about 180 km/h.

Casses of all schools are suspended.
Children should remain indoors. Doors and windows should be safely bolted.
Conclude all precautionary safety measures.
Bridges will close to all traffics at any moment, pending prior notice.
Television and radio stations broadcast round-the-clock.

8^SW

8^NE

8^SE

9

The center of a tropical cyclone is approaching MSAR and it is expected that MSAR might be severely affected.

Circulation of pedestrians and vehicles should be reduced the minimum;

Reinforce doors and windows with crossbars or heavy furniture;

Follow recommendations and warnings through informations media oftenly;

Beware - a temporary calm in the midst of hurricane force winds generally indicates that the center of the tropical cyclone is over MSAR.

10

The center of the on-coming tropical cyclone shall strike at the immediate approaches of MSAR. The mean wind speed should exceed 118 km/h with gusts of great intensity.