A specialist ship on its way to restore a vital communications cable linking Tonga to the rest of the world is expected to reach the archipelago on Sunday, two weeks after a volcanic eruption and tsunami damaged homes, resorts and infrastructure. The ship left Port Moresby, Papua New Guinea, almost 5,000 km (3,000 miles) away on Jan. 20, according to Refinitiv Eikon data, and is expected to need a few weeks to carry out complicated repairs to the undersea cable. ... Faults in the world’s 436 active undersea cables are common and typically most traffic would be rerouted to another...