This article presents a new kind of gravitational-wave detector, named by the author as the Witte-Ulianov Time Interferometer (WUTI) gravitational-wave detector. This new detector is based on the General Relativity (GR) concept that gravitational fields change "time flow".In February 2016 the world received news that the Laser Interferometer Gravitational-Wave Observatory (LIGO) finally and successfully detected a gravitational-wave. Nevertheless, LIGO´s detectors have several technical limitations, mainly associated with low frequency noise sources, which result in a narrow measuring range, from 80 to 300Hz. It is very little if we consider that important events can generate gravitational-waves having periods of time ranging from a few seconds to several hours long. Using an analogy, we can say that LIGO shows us a universe that can be observed by gravitational-waves. Though, unfortunately, LIGO`s narrow measuring range has not really "opened the door" for this new universe, only allowed us to look at it through the "keyhole".The Witte-Ulianov Time Interferometer can detect gravitational-waves, based on time distortion that, as provided by General Relativity, happens when this kind of wave passes through the detector. To measure distortions of time, WUTI uses the Witte effect. This effect was first observed by R. D Witte in 1991 when he was measuring errors in atomic clocks. The Witte effect allows the observation of time distortions by measuring phase changes over precise time sources. This author believes that the Witte effect enables us to measure changes in the "time flow" between two points in a space, using two very accurate clock sources (atomic clocks or high stable frequency laser sources). When these clocks are hit by a gravitational-wave, the "time flux" between these points changes. These changes can be easily observed using phase comparators. As the WUTI detector of gravitational-waves monitors "Time flow", its operation is minimally affected by physical phenomenon, in contrast to the LIGO detectors that are affected by many noise sources (mainly in low frequencies).Therefore, the WUTI detector is able to operate without low frequency limitation, making it possible to detect gravitational-waves that have time periods of seconds, minutes or even hours. This allows the detection of very slow of gravitational fields, enabling the observation of variations in the fields around Earth, caused by the planet´s displacement and rotation. The WUTI is able to observe the moon and the sun´s gravitational fields, and also the Milky Way´s gravitational variations. This means this detector can "see" not only gravitational-waves, but also the Gravity Ocean in which the Earth sails.