Houghton Bay, Wellington South Coast on 28 Feb 17
This dive is another solo reconnaissance dive looking for Amigo field trial sites.
The dive conditions today were truly awesome. Just a very gentle zepher from the South, with no chop and a slow 0.5 m swell. The air temperature was a balmy 25°C. The southern cost was shrouded by the edges of a fog bank at the start of the dive that had begun to lift by mid-afternoon.
![IMGP6587 IMGP6587](../assets/images/autogen/IMGP6587.jpg)
Figure 1. Houghton Bay (Western side looking South to fog bank.)
![IMGP6594 IMGP6594](../assets/images/autogen/IMGP6594.jpg)
Figure 2. Swell at Elsdon Pipe
This dive site is located within the Taputeranga Marine Reserve. I haven’t been been diving in this area for years (long before it was ever a marine reserve) and what I saw today is testament to the value of marine reserves. Large schools of fish, crayfish nests, large paua, and almost no rubbish other than a few plastic bags entangled in the kelp... (but we are getting ahead of ourselves).
I got to the site somewhat earlier than expected and had a full half hour to rock-hop along the shoreline thinking about my dive plan.
![Houghton--Bay Houghton--Bay](../assets/images/autogen/Houghton--Bay.jpg)
Figure 3. Dive Plan Map
The dive started at 1 pm (30 minutes before low tide) at a handy channel through the rocks just south of the Elsdon pipe (an old and no longer used sewage outfall).
![IMGP6590 IMGP6590](../assets/images/autogen/IMGP6590.jpg)
Figure 4. Elsdon Pipe
![IMGP6595 IMGP6595](../assets/images/autogen/IMGP6595.jpg)
Figure 5. Entrance Channel (Note that the fog has moved in.)
I shortened the planned surface swim and started a gradual descent with plenty of equalizing. I followed the reef around to South East to a depth of 12 m. Visibility was about 6 m but dropped somewhat at the base of the reef due to stuff stirred up by the surge.
At a depth of 12 m I headed ~ East over an open sandy bottom for 50 kick cycles (double kicks - approximately 100 m) maintaining a depth of about 12 m. The area is pristine rippled white sand with no obstructions or rubbish, and no apparent marine life.
![GOPR0030 GOPR0030](../assets/images/autogen/GOPR0030.jpg)
Figure 6. Hundreds of Metres of Clear Sand
I headed due South for about 20 m and headed slightly South of due West back to the reef. More clean sand. This site will be ideal for testing the Amigo in the right weather conditions provided that I can get a permit for conducting research in the marine reserve.
I then headed ~ South along the reef to 100 bar, essentially looking at the reef and its inhabitants. The reef has a good covering of short kelp and other varieties of sea weed, with small sponges. Notable by their scarcity were starfish and sea urchins. There were plenty of large paua (abalone) - some of the largest that I have ever seen.
![GOPR0036 GOPR0036](../assets/images/autogen/GOPR0036.jpg)
Figure 7. Big Old Paua
There wasn’t the greatest range of fish species but there were plenty of fish, Blue cod, spotties, green wrasse, porae, and jack mackerel. There is a lot more to see here. I could easily spend an entire dive working a 20 m patch of the reef looking at the small stuff like tripple fin and nudibranch.
![GOPR0066 GOPR0066](../assets/images/autogen/GOPR0066.jpg)
Figure 8. Blue Cod
![GOPR0065 GOPR0065](../assets/images/autogen/GOPR0065.jpg)
Figure 9. Cray (Note that these critters were not diver-shy.)
![Fish-1 Fish-1](../assets/images/autogen/Fish-1.jpg)
Figure 10. Nice Porae
![mackrel mackrel](../assets/images/autogen/mackrel.jpg)
Figure 11. Schooling Jack Mackerel (Really impressive - I’ll post a video in due course.)
Click here to see the schooling jack mackerel video.
Time to head home heading North to north-west essentially following the edge of the reef but with the occasional foray into the maze of steep walled cannons (complete with some good swim-throughs), or over a canyon wall or pinnacle. This was great fun with the surge, and sitting in the shelter of cracks and crevices were numerous good sized crayfish.
![canyon canyon](../assets/images/autogen/canyon.jpg)
Figure 12. Reef Canyon
![Swimthru Swimthru](../assets/images/autogen/Swimthru.jpg)
Figure 13. Swim Through with Inhabitants
![Crays Crays](../assets/images/autogen/Crays.jpg)
Figure 14. The Inhabitants
Click here to see the swim through video.
The dive was completed in 53 minutes (exactly one hour with the initial surface swim) with a maximum depth of 13.1 m at a temperature of 15°C. My dive navigation was spot on, surfacing from a depth of 3 m with a 20 m snorkel down the entrance channel to the exit point.
|