Skip to content

Southern Fried Science

Over 15 years of ocean science and conservation online

  • Home
  • About SFS
  • Authors
  • Support SFS

Category: Oceanography for Everyone

Comparing the OpenCTD to a YSI Castaway

Posted on September 21, 2024September 21, 2024 By Andrew Thaler
Comparing the OpenCTD to a YSI Castaway
Education, Featured, Oceanography for Everyone

For close to two decades now, the venerable YSI Castaway has been the gold standard for small, relatively cheap, handheld CTDs. In the early days of OpenROV, the robot’s little payload bay was sized explicitly to fit a Castaway. When Kersey and I started building the OpenCTD, our benchmark for viability was how well the … Read More “Comparing the OpenCTD to a YSI Castaway” »

Did you calibrate you CTD today?

Posted on June 19, 2024June 19, 2024 By Andrew Thaler
Did you calibrate you CTD today?
Featured, Oceanography for Everyone, Open Science

The first time I went to test an OpenCTD head-to-head against a hand-held commercial CTD, something was wrong. It was early in the OpenCTD development, but we were deep enough into the weeds that we had what we thought was a pretty good calibration process. The OpenCTD looked good against our standards. But the devices … Read More “Did you calibrate you CTD today?” »

A calling card for oceanographers

Posted on May 24, 2024 By Andrew Thaler
A calling card for oceanographers
Featured, Oceanography for Everyone

I spend a lot of time talking about the OpenCTD, my important, gigantic electronics project aimed at making the foundational tool of oceanography available to those most directly affected by our changing oceans. It’s been a minute since I’ve written about any of my weird little electronics projects. I do lots of weird little electronics … Read More “A calling card for oceanographers” »

Independent ocean science requires local support: testing our mobile OpenCTD factory.

Posted on May 3, 2024May 3, 2024 By Andrew Thaler
Independent ocean science requires local support: testing our mobile OpenCTD factory.
Featured, Oceanography for Everyone, Open Science

What if you could drop an oceanography lab anywhere? Not just the instruments and equipment, but the expertise to maintain the equipment and train ocean knowledge seekers. What if you could deliver an instrumentation factory anywhere it is needed, so that people with the desire and need to study and understand the ocean had the … Read More “Independent ocean science requires local support: testing our mobile OpenCTD factory.” »

Community Oceanography with low-cost, open-source CTDs

Posted on September 23, 2022 By Andrew Thaler
Oceanography for Everyone

On September 14, 2022, I gave a talk on community oceanography and the OpenCTD for the AtlantOS Ocean Hour “Democratizing ocean observations through low-cost technologies” workshop. Below is the transcript from that talk.

Good morning and thank you for inviting me.

Access to the tools of science is not equitable, and nowhere is this inequality of access more pronounced than in the ocean sciences, where all but a few entities have the capital to mount major oceanographic research campaigns. I come from the world of deep-sea ecology, where budgets can quickly climb into the tens of millions of dollars. But even small-scale coastal research can be stymied by the need for vessels, equipment, and instruments, access to which is often controlled by research institutions.

As the need to understand the dramatic changes happening both at the surface and beneath the waves accelerates, barriers to access that precludes the participation of the full breadth of ocean stakeholders erodes our potential to understand, anticipate, and mitigate those changes.

One of the missions of my post-Academic career has been to make the tools of ocean science more accessible to more people. I believe that the ocean belongs to everyone and that the tools to study the ocean should be available to anyone with the curiosity and motivation to pursue that inquiry.

Chief among those tools is the workhorse of oceanography, the CTD.

Read More “Community Oceanography with low-cost, open-source CTDs” »

The next generation of low-cost, open-source oceanographic instruments is here! Meet the OpenCTD rev 2!

Posted on January 7, 2020January 7, 2020 By Andrew Thaler 1 Comment on The next generation of low-cost, open-source oceanographic instruments is here! Meet the OpenCTD rev 2!
Oceanography for Everyone, Open Science, Science
Four generations of OpenCTD. Left to Right: Prototype 2, which went through sea trials in Lake Superior, rev 1, rev 1 in the smaller form factor (this one was deployed in Alaska), and OpenCTD rev 2.

In 2013, Kersey Sturdivant and I embarked upon a quixotic quest to create an open-source CTD — the core tool of all oceanographic research that measures the baseline parameters of salinity, temperature, and depth. We weren’t engineers; neither of us had any formal training in electronics or sensing. And, full confession, we weren’t (and still aren’t) even oceanographers! What we were were post-doc marine ecologists working with tight budgets who saw a desperate need among our peers and colleagues for low-cost alternatives to insurmountably expensive equipment. And we had ties to the growing Maker and DIY electronics movements: Kersey through his work developing Wormcam and me through my involvement with OpenROV. 

We had no idea what we were getting ourselves into. 

The very first OpenCTD prototype.

Seven years and five iterations later, we are releasing the long anticipated OpenCTD rev 2 as well as the comprehensive Construction and Operation Manual! OpenCTD rev 2 builds on over half a decade of iteration and testing, consultation with oceanographers, engineers, developers, and makers around the world, extensive coastal and sea trials, and a series of workshops designed to test and validate the assembly process. 

Read More “The next generation of low-cost, open-source oceanographic instruments is here! Meet the OpenCTD rev 2!” »

The next generation open-source, 3D-printable Niskin bottle has arrived!

Posted on February 12, 2019February 12, 2019 By Andrew Thaler
Oceanography for Everyone, Science

The Niskin bottle, a seemingly simple device designed to take water samples at discrete depths, is one of the most important tools of oceanography. These precision instruments allow us to bring ocean water back to the surface to study its chemical composition, quality, and biologic constituency. If you want to know how much plastic is circulating in the deep sea, you need a Niskin bottle. If you need to measure chemical-rich plumes in minute detail, you need a Niskin bottle. If you want to use environmental DNA analyses to identify the organisms living in a region of the big blue sea, you need a Niskin bottle.

View this post on Instagram

It's ready! The next-generation open-source, 3D-printable Niskin bottle is here! What do you want to sample? #ocean #oceanography #opensource #3dprinting #ecology #conservation

A post shared by Andrew David Thaler (@drandrewthaler) on Feb 12, 2019 at 2:52pm PST

Niskin bottles are neither cheap nor particularly easy to use. A commercial rosette requires a winch to launch and recover, necessitating both a vessel and a crew to deploy. For informal, unaffiliated, or unfunded researchers, as well as citizen scientists or any researcher working on a tight budget, getting high-quality, discrete water samples is an ongoing challenge.

Read More “The next generation open-source, 3D-printable Niskin bottle has arrived!” »

Documentation is the beating heart of open-science hardware: Help make ours better!

Posted on October 6, 2017 By Andrew Thaler
Oceanography for Everyone

The OpenCTD and Oceanography for Everyone has been a five year journey from inception to first field-ready model and we’re just getting started. Building a community-driven project like this requires not just expertise (that we didn’t have when we started), passion, resources, it requires documentation. Extensive, detailed, thorough documentation. Documentation is what sets an open-science … Read More “Documentation is the beating heart of open-science hardware: Help make ours better!” »

Ocean Outreach in an Evolving Online Ecosystem: Exploration wants to be shared

Posted on August 11, 2016 By Andrew Thaler
Blogging, Conservation, Oceanography for Everyone, Open Science

This is the transcript of the keynote I delivered at the Fourth International Marine Conservation Congress in St. John’s, Newfoundland. It has been lightly modified for flow.

Read Act II: Transforming the Narrative.

Picture38

Now I want to shift gears and look towards the future, where we’re going, and what tools are available to help us get there. Because the future of ocean outreach, and really the future of ocean conservation, comes down to this one concept: “Exploration wants to be shared”.

Picture2
Sealand courtesy the Daily Beast

The online ocean ecosystem is full of platforms–preexisting tools that allow us to produce, share, broadcast, enhance, and manage our outreach campaigns. Not just the obvious ones like Twitter and Facebook, but more niche tools like Slack, github, Ushahidi, medium, and yes, even PokemonGo, or if you want something a bit more serious, consider R as something that’s not just a statistics package, but a way to share your own software and data with the scientific community.

Read More “Ocean Outreach in an Evolving Online Ecosystem: Exploration wants to be shared” »

Fun Science FRIEDay – Open-Acess Science for the Masses

Posted on July 15, 2016 By Kersey Sturdivant
Oceanography for Everyone, Open Science, Uncategorized

The oceans belong to all of us. With this simple statement in mind, the Oceanography for Everyone (OfE) project was launched with the goal of making ocean science more accessible. One of the biggest hurdles in conducting ocean science is instrumentation costs, and 4 years ago the OfE team began trying to make one of the most basic ocean science tools, the CTD (a water quality sensor that measures Conductivity-Temperature-Depth), cheaper… much, much cheaper!

Read More “Fun Science FRIEDay – Open-Acess Science for the Masses” »

Posts pagination

1 2 Next

Recent Popular Posts

Deep-sea Mining: It’s science fiction, until it isn’t.Deep-sea Mining: It’s science fiction, until it isn’t.May 14, 2025Andrew Thaler
My "Follow ocean science and conservation experts on Bluesky and Instagram" assignmentMy "Follow ocean science and conservation experts on Bluesky and Instagram" assignmentNovember 19, 2024David Shiffman
Here's what I teach my students about finding jobs in marine biology and conservationHere's what I teach my students about finding jobs in marine biology and conservationApril 10, 2024David Shiffman
Our favorite sea monsters – Ningen (#4)Our favorite sea monsters – Ningen (#4)September 7, 2010Andrew Thaler
Shark of Darkness: Wrath of Submarine is a fake documentaryShark of Darkness: Wrath of Submarine is a fake documentaryAugust 10, 2014Michelle Jewell
Alberta, Canada is the proud owner of the largest man-made pyramid on the planetAlberta, Canada is the proud owner of the largest man-made pyramid on the planetOctober 16, 2012Andrew Thaler
What can the funniest shark memes on the internetz teach us about ocean science and conservation?What can the funniest shark memes on the internetz teach us about ocean science and conservation?November 8, 2013David Shiffman
I turned my woodshop into a personal solar farm.I turned my woodshop into a personal solar farm.June 21, 2021Andrew Thaler
A quick and dirty guide to making custom feeds on BlueskyA quick and dirty guide to making custom feeds on BlueskyFebruary 7, 2024Andrew Thaler
What is a Sand Shark?What is a Sand Shark?November 12, 2017Chuck Bangley
Subscribe to our RSS Feed for updates whenever new articles are published.

We recommend Feedly for RSS management. It's like Google Reader, except it still exists.

Southern Fried Science

  • Home
  • About SFS
  • Authors
  • Support SFS


If you enjoy Southern Fried Science, consider contributing to our Patreon campaign.

Copyright © 2025 Southern Fried Science.

Theme: Oceanly Premium by ScriptsTown