What was the most important invention to marine science?

The invention of the marine chronometer by John Harrison in the middle of the 18th century made true ocean navigation possible.

The virus is considered to be are living item since they have hereditary material dnas or rnas. they can imitate and change. they respond to boosts, for example, radiation, chemicals, and warmth. they have antigenic properties. they are proficient to duplicate with a same hereditary constituent.