For ocean sounding where the depth of water is too much and where continuous and accurate record of the depth of water below a boat or ship is to be made, the instrument generally used is known as

For ocean sounding where the depth of water is too much and where cont

1.	For ocean sounding where the depth of water is too much and where continuous and accurate record of the depth of water below a boat or ship is to be made, the instrument generally used is known as
A.	Tellurometer
B.	Sound meter
C.	Sound box
D.	Fathometer
E.	dB meter
Answer» C.