Indoor swimming pool bid for Brighton's Saltdean Lido
Campaigners have unveiled a plan to build an extra indoor pool at Saltdean Lido as part of their bid to run it.
Brighton council is taking bids from potential operators until 19 April.
Simon Doyle, from new charitable trust Saltdean Community and Leisure Centre, said their vision would make the site economically viable.
He said the indoor pool would be a central feature to the organisation's bid and all pools at the site would be connected with the sea.
Mr Doyle said the group wanted to retain and renovate the outdoor pools and also establish the lido as a water sports training centre.
"Our unique selling point as far as we know at the moment is that we plan to put an indoor swimming pool on to the site," he said.
"The ethos behind it, and the vision, is that we connect the indoor pools, the outdoor pools, and the sea, both physically and metaphorically," he added.
Last month, Brighton council said it had been talking to potential operators of the site, and the lease could be offered to a commercial company, a not-for-profit company trust, or a community organisation.
The council bought the deteriorating 1930s complex from its operator last June amid concerns over its future.
It said it would offer the Grade II* listed lido on a 50-year lease in a bid to attract sufficient investment to safeguard its future.
A separate group, Saltdean Lido Community Interest Company, which was set up by volunteers and campaigners in 2012, unveiled plans to provide all year-round leisure, recreational and community facilities at the lido in January.