Jackson Reef

Northernmost of the four Tiran reefs, Jackson takes the full push of water entering the strait, and its flanks show the reward: gorgonian fans, dense soft coral, and reef fish stacked into the current lines. The salvage-cut remains of the freighter Lara, wrecked in 1981, still mark the reef crest as a landmark. Most dives drift the southern and eastern faces in moderate flow, but when conditions allow, boats drop experienced groups off the northern point to hang in open blue - in summer, scalloped hammerheads patrol that deep edge. Eagle rays, turtles, and grey reef sharks round out a site that rarely repeats itself two days running.

The moment you come for: Summer hammerhead drops off the north point; gorgonian-covered walls; the Lara's remains on the crest.

Topography: Steep coral walls and terraces around a reef crown topped by wreckage

Current: The strait's exchange flow accelerates around the reef; slack windows are short.

Entry: Sheltered moorings on the southern side; drift dives and blue-water drops on the exposed faces when conditions allow.

Hazards: Strong, shifting current; blue-water descents on the north side; boat traffic in the strait.

Permits & rules: Tiran marine-park fee applies.

Nitrox: Worth it here: profiles sit in the range where enriched air meaningfully extends no-stop time (with the training to use it).