The USS Nimitz tracked these UFO with AN/SPS-48E 3-D air search radar, AN/SPS-49(V)5 2-D air search radar AN/SPQ-9B target acquisition radar, while the USS Princeton had even more advanced multifunction passive radar systems including the Aegis SPY-1B radar. Additionally, an E-2C Hawkeye plane in the area confirmed radar returns from these objects. Two F18 Super Hornets were tasked by the Nimitz with interception. Each jet had individual advanced AESA radar onboard and the information from these 2 systems was sent back to the Nimitz in real time. Each jet was also equipped with an Raytheon ATFLIR camera pod integrated into the gun sight tracking system and heads up display. This system is a single pod that combines mid-wave infrared targeting and navigation FLIRs, an electro-optical, or visual light, sensor, a laser rangefinder and target designator, and a laser spot-tracker. It can locate and designate targets day or night at ranges exceeding 40 nautical miles and altitudes surpassing 50,000 feet. Raytheon is so proud of these system's ability to a capture UFO's that they are now using this fact in their marketing!
https://www.raytheon.com/news/feature/uap_atflir
The UFO's were seen in both infrared and high definition video modes (note, the reason that the videos are so grainy is that they are copies of the original which are much clearer according to Navy witnesses). Now that we covered cameras, lasers and radar, next comes sonar. While we don't know the exact ship which had sonar returns testimony by USS Princeton radar operator Gary Vorhees stated he later confirmed from a Navy sonar operator in the area that day that a craft was moving faster than 70 knots underwater, roughly two times the speed of nuclear subs. Last but not least, we come to the people who saw these craft with their actual eyes, including the many pilots in the fighter jets and the trained naval observers and flight deck operators aboard the Nimitz.