ICE patrol ship HMS Protector will return home from her maiden deployment to the Antarctic tomorrow.
The Royal Navy ice-breaker will pass the Round Tower in Old Portsmouth at approximately 10.10am.
Protector has spent seven months surveying and patrolling the Antarctic Peninsula.
It was her first deployment since joining the fleet as a £26m replacement for HMS Endurance last year.
The ship departed Portsmouth last November and conducted studies for the UK Hydrographic Office, which provides 80 per cent of the world’s nautical charts.
She also resupplied British Antarctic Survey stations.
In February, 23 sailors from the ship tackled a ferocious fire which raged through a Brazilian research base on King George Island, killing two of the base’s personnel.
A few weeks later, Protector punched through the ice in a dramatic race against time to pick up a stranded team of British scientists.