The Leap Deep is the outer edge of the reef below The Leap, the part of the Kurnell headland that most shore divers only glimpse on the way past. Where the reef meets the sand the wall is either a sheer drop from 15 to 20 m or a more gradual slope depending on where you meet it, and to the west of the usual starting point it reaches 21–22 m and becomes, in McFadyen's words, even more spectacular. The face is thick with small gorgonians, sponges and sea squirts, and small overhangs shelter cuttlefish and octopus.

Followed east the wall turns south-east and then south towards the open coast. It carries the same syngnathid riches as the shallower Kurnell sites – seahorses, common seadragons and Sydney pygmy pipehorses – plus eastern blue devilfish in the undercuts, and the water column holds seapike, yellowtail, mado and ladder-finned pomfrets; pink-kneed sea spiders have been photographed mating on the sponges. The site can be dived two ways.

Boats anchor in 16 m at the GPS mark and divers work the wall east and west for about 40 minutes before returning to the line, which gives more time on the best section. Shore divers take the good stairs down from The Leap car park, enter with the usual leap, head north-north-east to the edge and, having explored the wall, drift west on the incoming tide to exit at The Steps exactly as on the standard Leap dive – deeper, longer and clearer, with visibility often 20–25 m on the outer edge. It is only diveable when southerly weather has the bay side of the headland in its lee, and the shore version carries all the exit caveats of The Leap.

For advanced divers it is the best wall on the Kurnell shore.

By boat from the Botany Bay ramps (Bonna Point at Kurnell is closest, 10 minutes; Kyeemagh 20 minutes): approach The Leap from the north, run slightly east until the sounder shows the reef and anchor in 16 m at the GPS mark. From shore: park at The Leap car park in Kamay Botany Bay National Park, take the good set of stairs down to the rock platform, leap in and head north-north-east to the reef edge; drift west on the incoming tide to exit at The Steps as for the standard Leap dive.

Suitable only when southerly or south-easterly swell and wind favour the bay side of the Kurnell headland; north-easterly swell over about 1 m makes both the shore exit at The Steps and the anchorage untenable. Drift dives must be on the incoming tide – on the ebb you are carried out towards the heads – and require an SMB deployed before ascent. Anchored dives allow about 40 minutes.

Visibility on the deep wall is often 20–25 m, much better than the shallows. Park gates lock at night for shore access.

From the anchor or the shore entry head north-north-east to the reef edge, then east along the wall for about 10 minutes examining the gorgonians and overhangs, and reverse to the west where the wall is more spectacular, turning south-east and south if you go far enough. Anchored: return to the line. Shore: continue west with the flood and exit at The Steps.

Abyss Scuba Diving and Sydney Dive Academy boats anchor here; Pro Dive and Abyss guide the deep shore version for advanced students.