Question

how can we calculate depth of sea

Answer 1

Sonar devices are used to measure the depth of sea.

Answer 2

The depth of sea can be calculated by using the sonar devices.

From the early days, the sea depth can be determined by using a method called sounding.

The sound lining is the oldest method which needs lots of time to calculate the sea depth.

The new transducer which is the receiver and transmitter of sound is used.