Answer:
First, of all we should always accompany some one when we are walking through a foggy area. As it may be very beneficial to have another person along us. Along with that if we hear one prolonged blast plus two short blasts, then we must not lose our nerves as there is always a need for a more active body mechanism or system to be more responsive in nature.But, one should be very aware of the different factors like he or she may have lost there way into the dockyard or they can be on the track to a restricted area because people are unable to see through the foggy space. But, there can be different reasons for such sounds.
- It can be due to any vehicle's engine because we can experience the engine of a boat making the same nature or sequence of sounds when they come to rest or when it is docked.
- While, it can be very alarming because some of the armory may be held responsible for such sequence of sounds to be generated. And for that reason the responsible authorities must be informed before its too late and along with that a proper protective options are required to be considered by the person who is experiencing such sounds in a foggy region.