A United States Navy cargo ship was due to be the first vessel to moor at the jetty that HMS Queen Elizabeth will call home.
Thick fog this morning meant she had to anchor outside the harbour, delaying an exercise to test staff and the equipment they'll use.
As Richard Jones reports.
Richard spoke to Chris Alcock from BAE Systems and Commodore Jeremy Rigby, Naval Base Commander.
Hampshire Fire & Rescue Service say they were called to a fire at a block of flats at Gunwharf Quays in Portsmouth just after midday.
More than 30 firefighters are at the scene. There have been no reports of any injuries. The fire started in a kitchen on the fourth floor.
The video is from @Hamblepoint
Gunwharf Quays - Closed due to Incident.
Hampshire Fire & Rescue Service at the scene. They are advising people in the area surrounding the fire to keep their windows shut so that the smoke does not enter their homes.
Video credit: Royal Navy
An unexploded Second World War bomb which was dredged up from the bottom of Portsmouth Harbour this morning has been safely detonated at sea.
The entrance to Portsmouth Harbour was closed until around 7:30am this morning after the discovery of the German SC250 bomb.
It was found at the head of a barge dredging the harbour which is part of ongoing preparations taking place for the arrival of the Royal Navy's new 65,000 tonne aircraft carrier.
Divers from the Southern Diving Unit 2 towed the bomb away from the harbour, lowered it to the seabed and planted explosive charges to begin a controlled detonation.
Shortly after 11am today it was destroyed in a plume of smoke and spray.
Roger Readwin, Royal Navy
The WW2 bomb which was found at Portsmouth Harbour earlier today has been safely detonated at sea by the Royal Navy.
It was detonated off the Isle of Wight after being discovered during dredging work for the Royal Navy's new aircraft carriers.
Restrictions have been lifted after a 500lb bomb discovered during dredging work for the Royal Navy's new aircraft carriers was towed to a safe location to be detonated.
Trains and ferries were cancelled and residents advised to stay in their homes following the discovery of the German Second World War bomb in Portsmouth Harbour.
Several pieces of unexploded ordnance have been found since work started to deepen the harbour channel to enable the next generation of carriers to access the Navy base.
Public transport links are now returning to normal. Portsmouth Harbour and Gunwharf Quays are also now open to the public.
"As always, the Royal Navy stands ready to respond to these call-outs and keep people safe.
"Despite being old, these devices can pose a very serious threat."
The unexploded ordnance found in Portsmouth Harbour this morning is now being moved to a safe place by The Royal Navy Ordnance Disposal and our police operation has been stood down.
Public transport links will be returning to normal. However be mindful that marine travel and ferries may still be affected so check before you begin your journey.
Portsmouth Harbour and Gunwharf Quays are now open to the public.
Wightlink ferries from Portsmouth are running again after sailings were suspended following the discovery of unexploded ordnance in the harbour.
The exclusion zone has been lifted, however it will take some hours before services are back to normal.
The St Clare car ferry is making her way to Portsmouth from Fishbourne and St Faith is preparing to pick up vehicles and passengers at Portsmouth.
Catamaran services to Ryde Pier will resume shortly.