Russian naval officers: The first to dock at the Faslane base

The home of the UK's Trident submarine-based nuclear deterrent will see boats from more than a dozen nations arrive to mark the centenary.

One of the first to arrive was the Russian submarine RFV Vologda.

It is the first time a Russian submarine has berthed at the home of the UK's nuclear deterrent

The occasion will be the biggest single event of the centenary year, and the largest gathering of submarines and their crews from around the globe.

Britain's submarine service began life with the launch of the Royal Navy's first submarine, Holland 1, at Barrow-in-Furness in 1901.

Events marking the centenary year in Scotland began in January with a service at the memorial to the 30 submariners who lost their lives on board K13, which sank in the Gareloch in 1917 during trials.

In June 1967, HMS Resolution with Polaris warheads sailed into its new home at the Clyde Submarine Base, Faslane.

Four Vanguard class submarines, each carrying 16 Trident D5 missiles, began to arrive at Faslane from 1994, when Polaris was decommissioned.

'Silent service'

In the early days the "silent service" operated tiny boats with crews as small as eight.

Massive technological developments have given submarines a speed, endurance, fire-power and a low-profile beyond the wildest dreams of early designers.

The huge Trident submarines weigh in at 16,000 tonnes, and are 150 metres long.

The aim of centenary celebrations is to mark the history and achievements of the submarine service and attract foreign participation to the events at Faslane.

Commercial companies, particularly those associated with underwater technology, are to attend two "trade fair" days, allowing them to showcase their products.

On 1 June, the Submarine Flotilla Queen's Colour will be paraded before HRH Princess Anne.