Little Saigon sits about 240 m north-east of Cape Baily Lighthouse and is the southern half of a pair of wall dives with Big Saigon, 140 m to the north. McFadyen's group named it after the number of Vietnamese fishers they saw on the rocks and in boats in the area when they first dived it. Like Big Saigon, it lies on a stretch of coast long shunned because of the Cronulla sewage outfall and the Kurnell refinery, and it is still dived only rarely despite being just 10–15 minutes from the Port Hacking ramps.

The reef top is at about 20 m, a little deeper than Big Saigon, and the wall runs north–south, dropping to around 24–25 m, with smaller walls stepping down past 32 m – McFadyen has not yet found where the reef meets the sand. The wall face is scalloped with overhangs and at least one small swim-through, and it continues north for about 200 m with consistent character. Gullies formed by very large boulders break the line of the wall, and away from it scattered boulders of all sizes create more shelter.

The encrusting growth is excellent – sponges in many colours, sea squirts and small gorgonians – and the fish life is prolific, with one-spot pullers, silver sweep, small seapike and yellowtail schooling along the face and mosaic and six-spined leatherjackets among the boulders. McFadyen rates it an excellent dive site. Combined with the Hilda wreck and Big Saigon, it makes the Cape Baily area a rewarding day for a private boat out of Port Hacking.

It suits Advanced divers with deep experience, ideally diving nitrox to get meaningful bottom time on a site that starts at 20 m.

Boat only – the Kurnell cliffs are sheer and in Kamay Botany Bay National Park, with no practical shore entry. From Botany Bay, launch at Kyeemagh (Cooks River), Foreshore Road or Bonna Point (Silver Beach, Kurnell), run out past Captain Cook's Landing Place, Inscription Point and The Leap, then turn south along the cliffs; from Port Hacking (Gunnamatta Bay/Tonkin Park or Lilli Pilli ramps) run out past Bass and Flinders Point and north-east along Bate Bay past Cronulla Beach and Cape Baily. From Port Hacking this is the closest of the Kurnell sites – about 10–15 minutes out past Bass and Flinders Point and across Bate Bay to Cape Baily Lighthouse; from Botany Bay about 25 minutes south past Cape Solander.

McFadyen's GPS is 34° 02.1883' S 151° 13.6522' E (WGS84), about 240 m north-east of the lighthouse. At the mark, find the wall a short distance to the east and anchor on the reef top at about 20 m. Big Saigon is 140 m to the north.

Cape Baily is one of the most exposed points on this coast, catching swell from the north-east through south; seas are often extremely rough and the site should only be dived with swell under about 1.5 m and light winds, ideally winter westerlies. The area was avoided for years because of outfalls from the Cronulla sewage treatment works and the former Kurnell oil refinery; water quality has since improved, but visibility still falls after rain. The East Australian Current can run along the cliffs.

Summer afternoon north-easterlies build quickly; morning dives are best.

Anchor on the 20 m reef top, drop over the wall to 24–25 m and follow it north past the overhangs and the swim-through, looking into the boulder gullies, then return along the top. Only experienced divers on nitrox should explore the deeper steps past 30 m.

No regular charter – private boat or dive-club (St George Scuba Club) only