The Fort Scratchley Historical Society will fire a seven-gun salute on Thursday as a part of the National Day of Mourning for the late Queen Elizabeth II.
The gates will open to the public at 9am, with the ceremony to start at 10am.
Historical Society President Frank Carter says it’ll commemorate Her Majesty’s time on the throne.
“We can’t fire 96 rounds,” he said. “It would take us all day and cost us a fortune.”
“The idea is for us to fire one round for every decade of her reign – so that gives us seven rounds.”
A reenactment group will also act as a guard of honour at the event.
Mr Carter is encouraging the community to come along and pay tribute to Her Majesty.
“I think it’s very important,” he said. “It’s one of the things that Fort Scratchley take very seriously in these sort of occasions and it’s the least we can do.”