Tower to light yellow for missing sailor Timmy MacColl
The lights on Portsmouth's Spinnaker Tower will turn yellow to raise awareness for a missing sailor.
Royal Navy sailor, Timmy MacColl, from Gosport, vanished in Dubai during a port visit by HMS Westminster in May.
It is believed crewmates put the father of two in a taxi from a hotel bar after a night out, but he never arrived back on board.
The "ribs" on the 558ft (179m) attraction will be lit yellow from 19:00 BST on Father's Day.
It follows a Bring Timmy Home campaign by family and friends who have been raising awareness by placing yellow ribbons around the area.
A Facebook page has also been set up which has attracted 118,000 people.
Jim Cunningham, grandfather of Timmy's wife, Rachael MacColl said lighting the tower was "a wonderful gesture".
Mr Cunningham said the family were coping with "extreme difficulty" as efforts continue to discover Leading Seaman MacColl's whereabouts.
He said: "We've no idea what's happened, there are conflicting stories, the assumption is that he got into the taxi, that's all the information we have to go on as a family."
Leading Seaman MacColl is described as white, 5ft 8ins tall, of medium build, with short brown hair cropped with a flicked fringe. He speaks with a Scottish accent.
He was last seen at 02:00 local time on 27 May.