The search for a missing submersible carrying five people to the Titanic wreck site is still ongoing, with the U.S. Coast Guard reporting underwater noises that are being actively investigated. The submersible, named the Titan, disappeared on Sunday during its dive and prompted a large-scale search effort from U.S. and Canadian teams in the north Atlantic Ocean. 

Key Points: 

1. The U.S. Coast Guard and a Canadian search plane have detected unexplained underwater noises in the search area where the submersible disappeared, leading to intensified search efforts in that region.
2. Two Remotely Operated Underwater Vehicles (ROVs) are currently being used in the search, with more expected to join on Thursday.
3. The 21-foot submersible named the Titan, operated by OceanGate Expeditions, lost contact about 900 nautical miles off the coast of Cape Cod, Massachusetts, on Sunday, an hour and 45 minutes into its dive.
4. The search area has expanded to approximately twice the size of Connecticut, covering underwater depths of up to 2.5 miles.
5. The U.S. Coast Guard remains optimistic about the search, noting that this is still a “search and rescue” mission, though acknowledging that there might come a point when a decision about continuing the efforts would need to be made.

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