Scapa Flow is in the Orkney Islands in Scotland at the most northern tip of the UK. There are eight main ship wrecks to dive that remain from the scuttled German fleet. The dive depths range from about 12 metres (40 feet) to about 45 metres (150 feet). The waters are the warmest in September where they rise to 14C (57F), but go down to 4C (39F) in April. Visibility can be as good as 30 metres (100 feet), but also drop to around 10 metres (33 feet). Which in UK terms is very good visibility. Dive boats are boarded at a place called Stromness on Orkney mainland.
This is a short scuba diving story when my dive buddy and I were scuba diving along Triggerfish Alley in the Red Sea. This particularly aggressive Titan Triggerfish took an immediately dislike to my dive buddy. I turned to see her kicking her fins vigorously which was unlike her. Then I saw the reason, she had a Titan Triggerfish snapping at her heals like a Jack Russell Dog. I swam to her rescue like a ‘diver in shining armour’ and all ended well. We swam away from this Triggerfish and she didn’t get bitten.
You can dive year-round on the Great Barrier Reef. Although the best conditions for scuba diving are from June through October. For liveaboard diving, the best time to go is July through November. In the Coral Sea, the visibility is best in June and in September.
Deep diving is underwater diving to depths beyond first stage diver training. For PADI and NAUI this means deeper than 18 metres (60 feet) and BSAC deeper than 20 metres (66 feet). But in practice deep diving is beyond 30 metres (98 feet) when divers can experience nitrogen narcosis.
Night diving is scuba diving either at night or at dusk where your underwater world experience changes. It changes from an environment that’s lit up by the sun, to one that’s illuminated by your divers torch. The creatures that usually go about their daily business on the reefs and wrecks during daylight hours are hiding and asleep. You then discover the wildlife that ventures out at night instead. You only see the small field of vision illuminated by your divers light, which is a whole new experience and an exhilarating one too.
A drift dive is a scuba dive in waters where there’s a tide or current flowing. This current will be strong enough to push you along in the water. The fun lies in going with the flow! If you’re diving in a current of half a knot or more, then I’d class this as a drift dive. But a dive where there’s a ‘drift’ may not always be about the drift itself. You may be scuba diving to see sharks that happen to be there because of the strong current. In which case you may not want to be drifting in the current.