Mundesley's refurbished Coastwatch station was officially reopened by MP Norman Lamb in front of a small group of staff and invited guests.
After cutting the ribbon, Mr Lamb was treated to a tour of the station where he spoke to watchkeepers about their work.
He said: 'I am immensely impressed by the work of these dedicated volunteers.'
Mundesley Coastwatch station originally opened in 1995 to provide a lookout on the coast and to alert the Coastguard to potentially life-threatening incidents at the earliest opportunity.
Some 180 square miles of sea are visible from the station, which is open from 8am to 6pm, 365 days a year and is staffed by a team of 50 volunteers.
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