Moved the Portmarnock Sub-Aqua Club to be more precise.
Use sport=scuba_diving to tag Portmarnock Sub-Aqua Club as suggested at http://wiki.openstreetmap.org/wiki/Talk:Tag:sport%3Dscuba_diving
Change Portmarnock Sub-Aqua Club tags to "sport, diving".
High Rock is used for swimming
Added parking at High Rock
Added High Rock (Portmarnock) viewpoint.