I have been 3D printing different mount designs for my GoPro in order to take photos of the seafloor from my boat / kayak for several months now. I am finally happy with the design and have posted it on Thingiverse if you want to print one yourself.
The mount connects a GoPro to a 1kg dive weight with additional cable ties. You can then lower the drop camera into the water to take photos and videos of the seafloor at different angles. I attach the mount to a diving reel with a stainless steel carabiner snap hook.
I was inspired by Professor Murray Cox (who had done some simulation work on exotic Caulerpa growth) to make a tool that predicts exotic Caulerpa coverage based on some currently unknown variables. Here is a link to my exotic Caulerpa simulator. Please feel free to email me if you have any new data which would make it more accurate.
I made this sign to help the Tāmaki Estuary Protection Society enforce the set net ban. I am uploading it here so that the map in particular is easily found on the internet.
Set nets are banned in the Tāmaki Estuary. Set nets indiscriminately catch non- target fish species; birds and mammals. There has been a recent increase in illegal set netting in the Tāmaki Estuary, please help protect our fisheries and other wildlife.
From my experiments with underwater tripods I learnt that weight is more important than a wide base for maintaining stability. This is version two of my plastic bottle tripod which I deployed in a gull colony and was pleased with the results. Construction notes:
Painted 1.5L orange juice bottle (thx Charlies Orange Juice)
Slit down the side for inserting 5kg of dive weights
Washers on either side of screw through lid help with stability (flexible plastic lids introduce some wind wobble)
Of all the jobs that Artificial Intelligence (AI) will replace over the next few decades I never thought mine would be top of the list. I got my degree in illustration 20 years ago, since then I have picked up many more skills but I have always been most proud of my ability to draw. I thought it made me more ‘visually intelligent’ than other creatives because of the volume of data an illustrator has to generate. Over the last few months I have been absolutely blown away by three tools, DALL-E 2, Stable Diffusion and Midjourney. These AI tools are so much faster than me, they have more range, and in most cases are just better at drawing than me. If you want to see what they can do checkout this gallery.
The tools do have some limitations, the main one being the sizes of the images they can draw, but most of these will get solved with market demand. Of course the first thing I wanted to know is how good it was at drawing the things I love, New Zealand animals. My ego was quite pleased to see them fail miserably and in quite entertaining ways (go try kiwi here). Here are some examples of white-faced herons (I have chosen a very well photographed species on purpose).
This is mostly because the AI’s have not been trained how to draw these animals. In the above examples MidJourney and Stable Diffusion confuse our native heron (which can also be found in Australia) with a North American Great blue heron. Developers are working on multiple ways for users to be able to train tools to draw specific subjects. One of them (DreamBoth for Stable Diffusion) involves training a model based on 20 or so images. I happen to be a very organised photographer with 2,700 bird photos and 3,300 photos of invertebrates all cataloged by name, place and time. It took me some time to figure out how to do it and it takes a lot of computing power to train the models, here are the 20 photos I used to train my white-faced heron model.
And here are some of the results (good and bad):
You can see there are still some problems but its pretty good! I can easily fix them up to create future works.
I have been using the tools to create components for illustrations (photo bashing). Here is an example that would have taken me ages to draw from scratch.
James Cook and his men encounter a kahikatea forest in the Waihou River in 1769
I’m excited about the tools and think they will make my work better, faster and cheaper.
The tarāpunga that nest under the Panmure Bridge are heavily impacted by humans, the national population is in decline. While deploying a nesting structure for tara / white-fronted tern yesterday we also added a small extension to the Panmure tarāpunga nesting structure. We upcycled old wood which fitted the rustic nature of the old bridge. The six nesting areas were c35cm x 25cm. The gulls were already a few weeks into nesting with some three eggs nests. As the colony is currently space limited I think the structure will help, but we may have been a bit late deploying. The gulls also nest on boats in the estuary so if some get disturbed they may move to the main colony. It was promising to see two gulls having a tussle over the new nesting area while we exited the estuary.
Photo taken 5:30pm 18 September. Gulls regularly seen on the platform, but not sitting.Photo taken 2 November. Success!Photo taken on pole camera shows six nests.
I checked many old boats moored in the Estuary and did not find any with nests which is great. One pair of gulls nested on a post, another on a jetty where it’s likely to be disturbed. There is a clear case for extending the nesting platform in 2023.
This photo of a parent attending a chick in the current upstream from the colony indicates there may be some benefits to creating a ramp of sorts for the juveniles.New addition added. Noted 8 infertile eggs on site, one dead chick, two chicks remaining, no dead birds with fishing line attached but any bodies may have been blown into the estuary by the cyclone. Some fishing line removed from site. One fledgling was in the water and calling, it would be good to have a ramp or additional floating area(s), this may reduce chick mortality and would definitely reduce colony stress.
Added some extensions after taking this video (30 September 2004)
This one has quite tight spacing (c25cm) but I know from the tara next box experiment it will not be a problem.We ran out of wood and this large platform only has one divider, it will be interesting to see how many gulls still want to use it.Both new platforms utilised. Photos October 10 2024 by Matt Rayner.
24 Reef balls were deployed in two reefs at Long Bay-Okura Marine Reserve in 2001.
Launching the reef balls, photo care of Jonathan Jaffrey
They were quickly colonised and dramatically increased the biodiversity in the area.
A lonely reef ball, photo care of Jonathan Jaffrey.
I have wanted to find these artificial reefs for years and made three attempts. The first dive from the shore was unsuccessful (its too far out and I dont have underwater GPS). The second and third efforts below used line and sonar but still came up empty. I think they have been buried (sunk into the substrate) but I would love to be wrong. The photo above shows a lot more shell on the seafloor than I found 20 years later. I’m not planning any future searches.
12 January 2022 4:15pm High Tide 5-10 knots .5m-1m swell Shaun Lee & Jordi Tablada
Boat to from Winstons Cove to Long Bay 12:00pm Look for Reef Balls:
Zig Zag Reef 36° 40’ 52” S, 174° 45’ 14.8” E 36.681111, 174.754111 5.5m at Low tide
Octagon Reef 36° 40’ 51.1” S, 174° 45’ 19.6” E 36.680861, 174.755444 6.2 M at low tide
Dropped anchor 5m from Zig Zag using Garmin GPS Dived down anchor with line on reel Vis 5m surface, <1m bottom 5.5m deep, tied line around anchor, spiral search pattern Let line out >30m possibly didn’t turn enough and made more of a sweeping arc Hoped line would have snagged of epibenthic fauna attached to reef balls but following line back found nothing Quick check near boat found nothing c30mins total bottom time Noted layer of mud under sand A few cushion stars, some heart urchins, Jordi saw a Spengler’s Trumpet Some dead tutua shells under sand Large snapper under us when we surfaced
Dropped anchor 5m from Octagon using Garmin GPS 7 minute look in the direction of the reef Nothing in particular
2:30pm head back as wind pickup up (15knots developing in afternoon).
Resolved to search with a boat that has sonar / fish finder next time.
Thursday 9 September 2022 High Tide 5:30pm With skipper Ed Chignell
Zig Zag Reef 6.7m 2:45pm c7 spirals out from waypoint. No clear benthic structure seen on downscan or sidescan.
Octagon Reef 8m 3:10pm c3 spirals out from waypoint. Drifted south over fishy looking shape 5m south of the waypoint on the downscan. It was still there 5 minutes later so we dropped anchor on it.
I descended the anchor line. Vis 3m, bottom 8.8m. I spiralled out from the anchor for 5 minutes then headed north for an additional 5 minutes. The seafloor was sand/mud with some shell. Nine cushion stars and about six large hermit crabs were seen in 10 minutes. After ascending and heading a bit further south I dropped down for another 5 minutes to check out another fishy shape but didn’t see any reef balls or fish. Many fish were seen in the fish finder.
Note visibility much better than last dive even tho it rained heavily just a few days ago. Hardly any swell or wind over the last two days.
With video lights increasing in power some underwater photographers are wondering if they should skip the strobes and go for more expensive videos lights that deliver a WYSIWYG (what you see is what you get) photographic experience. Here I test a Sea & Sea YS-D3 II Strobe and a BigBlue 36000-Lumen Pro Video light. See testing setup photo above with lamp on which was turned off for the test. Settings: 1/250, F14, ISO 100 on an exposed and fogged up Laowa Probe Lens with no focusing light.
YS-D3 II Strobe only on left hand side. Full power manual no focus light, default diffuser on.BigBlue 36000-Lumen Pro Video only on right hand side. Full power.Strobe on left video light on right.
They seem to be about equal power which is interesting as I would have thought I would get more power from the strobe which has a guide number of 33. The difference in colour temperature is negligible with white balance set to auto (YS-D3 II Strobe = 5,800k, BigBlue 36000 = 6,500k).
I think its safe to call the YS-D3 II Strobe a 36,000 lumen light.
Here is a simplified version of my photogrammetry settings in Agisoft Metashape Standard 1.8.1 (mostly for my own reference). Detailed explanation here Mapping life on the seafloor/
I figured out how to dive from my kayak this summer. It’s been really fun with lots of advantages including:
Less swimming effort for shore dives
Lower emissions than diving from a boat
Some locations are easier for me to access via kayak
Less drama / hassle than a boat
At first I tried towing my kayak to the water with my tank onboard. The C-Tug SandTrakz Cart Kayak Trolley is great but not designed to carry so much weight. Even without the tank I have broken one of the straps. I now carry my tank and BCD while towing the kayak with everything else onboard including my weights.
The other thing I find very useful is these stainless steel D-Eye Swivel Snap Hooks. The anchor, wheels and camera all get clipped on so nothing falls off. Even though I have clips for my paddle I tie it on as I really dont want my paddle gone when I resurface.
I found putting the BCD on in the kayak too hard so I just do that in the water, it has its own little rope & clip so it does not float away. I also 3D printed a fitting to get a little dive flag going but it should be bigger.
I love having more gear closer when shore diving, including my phone, dry keys and something warm to eat as soon as I get out of the water :D. I’m sure my set up will evolve over time (I need a slightly heavier anchor for soft substrates) but I’m really happy with this and plan to do lots more.
Extra photos by Kirk Tucker
Update August 2024
With the C-Tug Double Up Bar (four wheels!) I can now take everything down to the beach in one trip. I’m not quite strong enough to get it back up the steepest bit of sand in one trip and I take the dive tank back up separately.
