Scuba diving - scuba diving to the following depths. Provided You are
diving under the direction of an accredited dive marshal, instructor or
guide. Alternatively, if qualified, within the guidelines of the relevant
diving or training agency or organization and not diving alone: PADI Open
Water -18 metres PADI Advanced Open Water -30 metres BSAC Ocean Diver -20
metres BSAC Sports Diver -30 metres* BSAC Dive Leader -30 metres*
Under Grade 1, scuba diving must be on an incidental or casual/occasional
basis.