Warning

Every time we sell a manifold or switch block, we shudder a little bit. The gas switch block is used in primarily by hookah surface supply divers to switch from surface supply to emergency bailout gas. Manifolds are primarily used in gas distribution systems. But the key here is that there are not different gas mixtures involved.

Unfortunately divers sometimes get the idea to match these products up with multiple cylinders and/or or quick disconnects to create some type of elaborate system for rapid switching between different gas mixtures and/or cylinders. Gas switching errors are very often involved in technical diving accidents. Over the years we've learned about several near misses and fatalities that were directly attributable to mistakes with switch blocks that were connected to different gas mixtures. No matter how careful the diver, or how many safeguards, we think using switch blocks with different mixtures is a very bad idea.

Whalers Reef

Reef Dive | Boat access

Depth: 4 m (13 ft) to 10 m (33 ft)

Level: Open Water and beyond.

Whalers Reef is a limestone reef which is a nice shallow boat dive, great for beginners, located off Whalers Point in Portland, in Portland Bay (aka Henty Bay) on Victoria's Discovery Coast.

This area is frequented by boats, so please make sure you display your dive flag in this area.

Location: Portland, Victoria 3305

Whalers Reef is accessed by boat from the Portland Harbour, Lee Breakwater Road North Ramp or the Portland Harbour, Lee Breakwater Road South Ramp.

Best dived in good conditions with a low swell with light north or northerly winds. See WillyWeather (Whalers Point) as a guide for the tide times and the height of the tide.

Gunditjmara country

Traditional Owners — This dive site is in the traditional Country of the Gunditjmara people of far south-western Victoria which continues over the state border into a small part of south-east South Australia and is bordered by the Glenelg River to the west and the Wannon River in the north. This truly ancient Country extends 100 metres out to sea from low tide and also includes Deen Maar (aka Lady Julia Percy Island) where the Gunditjmara believe the spirits of their dead travel to wait to be reborn. We wish to acknowledge the Gunditjmara as Traditional Owners. We pay respect to their Ancestors and their Elders, past, present and emerging.

Whalers Reef Location Map

Latitude: 38° 20.184′ S (38.3364° S / 38° 20′ 11.04″ S)
Longitude: 141° 36.840′ E (141.614° E / 141° 36′ 50.4″ E)
Datum: WGS84 | Google Map
Added: 2022-05-17 09:32:01 GMT, Last updated: 2022-05-24 07:38:07 GMT
Source: Navionics Chart
Nearest Neighbour: New Zealander, 372 m, bearing 239°, WSW
Portland Bay, Discovery Coast.
Depth: 4 to 10 m.

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DISCLAIMER: No claim is made by The Scuba Doctor as to the accuracy of the dive site coordinates listed here. Should anyone decide to use these GPS marks to locate and dive on a site, they do so entirely at their own risk. Always verify against other sources.

The marks come from numerous sources including commercial operators, independent dive clubs, reference works, and active divers. Some are known to be accurate, while others may not be. Some GPS marks may even have come from maps using the AGD66 datum, and thus may need be converted to the WGS84 datum. To distinguish between the possible accuracy of the dive site marks, we've tried to give each mark a source of GPS, Google Earth, or unknown.