When a ship sinks, does it reach the bottom of the sea?

The pressure at the bottom of the sea is

An ultrasonic wave is sent from a ship towards the bottom of the sea. It is found that the time interval between the sending and the receiving of the wave is 1.5 s. Calculate the depth of the sea, , if the velocity of sound in sea water is 1400 ms^(-1) .

An ultrasonic wave is sent from a ship towards the bottom of the sea. It is found that the time interval between the transmission and reception of the wave is 1.6 seconds. What is the depth of the sea, if the velocity of sound in the seawater is 1400ms^(-1)

A strong sound signal is sent from a ship towards the bottom of the sea. It is received back after 1s. What is the depth of sea given that the speed of sound in water 1450ms^(-1) ?

The longitudinal waves starting from a ship return from the bottom of the sea to the ship after 2.64 s. If the bulk modulus of water be 220 mm^(-2) and the density 1.1xx10^(3) kg m^(-3) .calculate the depth of the sea. Take g = 9.8 N kg^(-1) .