SEOUL, Dec 25 (Reuters) - Hanwha's ‌Philly ​Shipyard has the capability ‌of building a nuclear-powered submarine for the ​U.S. Navy, said Alex Wong, global chief strategy officer at Hanwha ‍Group, according to a statement ​from the South Korean company on Thursday.

A video of the attack on Novorossiysk with the Sub Sea Baby drone shows a calm port with several ships before a massive explosion kicks up water and debris.

As it tried to demonstrate its continuing ability to fight, Ukraine said it had used drones to inflict serious damage on a Russian Kilo-class submarine at a Black Sea port.

The "USS Seawolf" is on deployment to preserve "a free and open Indo-Pacific region," the U.S. Navy has told Newsweek.

A British naval supply ship with an on-board helicopter was deployed to track the stealthy Kilo-class submarine Krasnodar, the Royal Navy said.

NATO planners will pay more attention to undersea surveillance and anti-submarine capabilities now that a fifth-generation Russian ballistic missile submarine (SSBN) has been confirmed. This focus will be especially important in sensitive areas such as the Arctic, the North Atlantic, and the Pacific approaches.

The U.S. Navy's nuclear-powered attack submarine USS Greenville docked at the Busan Naval Operations Base on Tuesday, South Korean officials said.

The General Directorate of Navy Materiel (DGMM) of the Brazilian Navy, the Indian Navy, and the Indian state-owned shipbuilder Mazagon Dock Shipbuilders Limited