

Sir John Young Banks is a deep-water site off New South Wales that demands serious technical credentials. The structure drops from 19 metres down to 70 metres, putting the lower sections firmly into decompression diving territory where nitrogen narcosis becomes a genuine planning consideration. Visibility runs between 15 and 25 metres, giving you solid sight lines across the reef as you work through depth stages. Currents here are variable and can turn strong without much warning, so buoyancy control and dive planning need to be tight before you splash. Various reef species populate the site across its depth range, with conditions favouring those who dive methodically rather than ambitiously.
-34.96667, 150.90000
Monitor current conditions carefully before committing to depth, as surface calm does not always reflect what you will find below. Confirm up-to-date access and support arrangements locally before your dive, as facilities are not guaranteed on site.
Access is by private boat or charter, typically launching from the Shoalhaven River mouth (Crookhaven Heads) or potentially Currarong. The trip is approximately 15-18 km offshore and takes 25-35 minutes in good conditions. A GPS is essential to locate the specific reefs.
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This is a deep, offshore site exposed to strong currents and open ocean conditions. It is suitable only for experienced divers. Fishing and spearfishing activities are common, creating potential boat traffic.
Depth
19-70m
Visibility
15-25m
Skill Level
Technical
Entry
Boat
Boat required
Water Temp
11-17°C
Current
Strong
Best Time
Year-round
Sir John Yong Banks in New South Wales requires advanced, deep and technical diving certifications due to its extreme depths of 19 to 70 metres. This technical dive site demands decompression procedures and specialised training to manage nitrogen narcosis risk at depth. Only divers with appropriate technical qualifications should attempt this challenging offshore location near Crookhaven Heads.
Sir John Yong Banks reaches depths from 19 metres to 70 metres, making it a technical diving site off the coast of Crookhaven Heads. The significant depth range requires decompression stops and proper planning for nitrogen narcosis management. All dives at this New South Wales location are boat-based due to its offshore position.
Sir John Yong Banks hosts pelagic species including sharks, whales and marlin alongside reef dwellers such as kingfish, groupers and cuttlefish. Divers also encounter leatherjackets and colourful sea whips in the strong currents that characterise this offshore New South Wales site. The depth range of 19 to 70 metres provides habitat for diverse species across different depth zones.
Sir John Yong Banks offers optimal diving conditions from January through August, covering the Australian summer and autumn months. Water temperatures range from 15°C to 25°C during this extended season, with visibility typically between 15 and 25 metres. The site near Crookhaven Heads is accessible by boat only during favourable weather conditions.
Sir John Yong Banks presents multiple technical diving hazards including mandatory decompression requirements, nitrogen narcosis risk at depths to 70 metres, and strong currents. Boat traffic in the area adds another consideration for surface intervals and ascents. Only divers with technical certifications and experience in deep, current-swept environments should attempt this advanced New South Wales site.
Sir John Yong Banks is accessed exclusively by boat from Crookhaven Heads on the New South Wales coast. No shore entry is possible due to the site's offshore location and depths of 19 to 70 metres. Charter operators familiar with the strong currents and technical requirements service this advanced dive site.
Sir John Yong Banks is strictly for technical divers and completely unsuitable for beginners due to its 19 to 70 metre depth range requiring decompression stops. The strong currents, nitrogen narcosis risk and requirement for advanced, deep and technical certifications make this one of the most demanding sites in New South Wales. Extensive experience in technical diving procedures is essential before attempting this offshore location near Crookhaven Heads.
A drysuit recommended is recommended for diving at Sir John Young Banks in Crookhaven Heads. Water temperatures range from 11°C to 17°C.
Sir John Young Banks in Crookhaven Heads has depths ranging from 19 metres to 70 metres.