HMS Temeraire will be open to the public on June 1 to show off the equipment used by the military and the emergency services.
The event at the Burnaby Road establishment began as an annual open day hosted by local law enforcement and emergency services to demonstrate their day-to-day role, but has grown over the years.
This year, all three armed forces will be represented at the event.
There will be a display arena with the aim of showcasing the work of police dogs and their military counterparts who are used to find bombs in Afghanistan.
Cadets will battle it out in a field gun contest and crowd control experts will show how they deal with an unruly mob.
Visitors will also see Hampshire and Isle of Wight Air Ambulance helicopter touch down in the Temeraire grounds.
Entry to the event, from 10am to 3pm, is free, but visitors can make a donation to the Royal Navy and Royal Marines Charity.
‘It really will be a fantastic awareness day where children and adults alike can meet real people who are the job on a daily basis – and see some of the equipment that they use to do it,’ said Lt Emma Garey, who is HMS Temeraire’s First Lieutenant.