The ordinary sign utilized by sailboats in states of reduced visibility for example heavy fog is one large Blasts followed by two short blast.
Further Explanation:
Horns in Foggy Conditions:
In foggy conditions you hear one delayed blast in addition to two short impacts at regular intervals of 2 minutes.
Personal Safety During Fog:
Have all the team put on life jackets, as there will brief period if a collision happens
Consider carefully before having the team cut on [safety harnesses], as they should probably to jump clear in a collision.
On the off chance that the climate is unpleasant, the greater danger of falling overboard may require harnesses to be used.
The life-raft should be at the ready for moment discharge if necessary.
Have red and white flares nearby.
In quiet climate, think about putting the dinghy over the side, [ towing it astern ] and being accessible in the case of a collision
Fog Forecasting:
An exact method for fog forecasting is the utilization of a hygrometer to discover the dew point temperature of the air.
Answer Details:
Subject: Physics
Level: High School
Key Words:
Horns in Foggy Conditions:
Personal Safety During Fog:
Fog Forecasting
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