247Blasting underwater

247 Blasting underwater (1) Blasting underwater must be undertaken in accordance with (2) A shot-firer who intends to fire a charge underwater must ensure, before firing, that— (a) everyone in the water at the blast site, including any diver, is at a safe distance from the charge; and (b) any charges that are not in blast holes are secured against movement; and (c) if explosives that may be affected by water are used—the explosives are waterproofed, or are otherwise protected from the effects of water; and (d) if detonating cord is used underwater—suitable precautions are taken to ensure that any lines of cord intended to remain apart cannot be brought together by water current or wave action.