British photo championships
The on-the-day splash-in competition, organised by the British Society of Underwater Photographers (BSoUP), runs from the port's Mount Batten.
Competitors can photograph either around Plymouth or further afield – as long as they get their entries back to the competition base by the allotted time.
The overall winner will depart on a seven-day liveaboard holiday for two in the Maldives (exclusive of flights and taxes) courtesy of Maldives Scuba Tours.
Last year, 53 divers took part.