Shipping Forecast Warnings

Question 1

Fog / Dense Fog

Answer 1

Visibility less that 1000m / 200m, relative humidity less than 95%

Question 2

Ice Accretion

Answer 2

Only if more than 2cm/hour

Occurs when:
• Freezing Fog with OAT < 0 degrees
• Freezing Precipitation
• Sea Water / Sea Spray with a temperature < 0 degrees

Question 3

Gale

Answer 3

Winds of at least F8 (34-40kts) or gusts of 43-51kts

Question 4

Severe Gale

Answer 4

Winds of F9 (41-47kts) or gusts of 52-60kts

Question 5

Storm

Answer 5

Winds of F10 (48-55kts) or gusts of 61-68kts

Question 6

Violent Storm

Answer 6

Winds of F11 (56-63kts) or gusts of >69kts

Question 7

Hurricane

Answer 7

Winds of F12 (>64kts)

Question 8

Imminent

Answer 8

Within 6 hours

Question 9

Soon

Answer 9

Within 6 - 12 hours

Question 10

Later

Answer 10

More than 12 hours away