How are lighthouses useful ?

Lighthouses are situated

in dangerous places on

the coast or on isolated

rocks. Thanks to them,

sailors can pick out the

dangers at night. Each

sends out special flashes;

by observing them,

sailors can make out where they are located. 

Kindly 🍀share 🍀 this informative message with your good friends.

Kindly 🍀subscribe🍀 to my blog for further updates.