Maritime Ecology Field Notes

Collection: Field Notes -  Maritime Ecology

Subject: The Maritime Ecology Field Notes

Field Entry: April 15, 2026

This is the hub for everything on this site that touches the relationship between small boat sailing and the health of the water it happens on. It brings together three connected series: the impact of modern boating on marine ecosystems, the case for building differently, and an ongoing record of citizen conservation work done from the water.

They are connected because the argument runs in one direction. Industrial boating — fibreglass hulls, synthetic antifouling, diesel propulsion — extracts something from the marine environment with every season of use, and returns almost nothing except waste that cannot be easily undone. Understanding what that cost actually amounts to is the first step. Building and sailing differently is the second. Monitoring what is happening to the water and reporting it usefully is the third. None of these are sufficient on their own.

I paddle a skin on frame canoe on the rivers and lakes in the UK, and sail on the coats. Same waters, mostly, season after season. The VAKA boats are designed to leave as little trace as possible — no synthetic hull shedding fibres, no antifouling chemistry, no engine. What I can add from that position, beyond a clean hull, is observation: repeated, consistent, submitted to the people who need it. That is what the citizen conservation series is about. Also it gives the kids something to sink their teeth into if theyre getting a bit restless, so everyone's a winner!

Series One: The Impact of Modern Boating

The recreational boating industry has not been honest with itself about what it puts into the sea. The fibreglass hull problem alone — tens of thousands of derelict GRP boats with nowhere to go, slowly releasing polymer fragments into inshore sediment — is a crisis the industry created over sixty years and has not yet seriously addressed. The carbon footprint of a production sailing yacht, properly accounted across manufacture, use, and disposal, is substantially larger than most owners appreciate. And the antifouling chemistry that keeps hulls clean is doing measurable harm to the inshore ecosystems that coastal sailing depends on.

This series works through each part of that picture, with as much precision as the available data allows.

Sailing Beyond the Industrial Cage — The series introduction: what the industrial model of recreational boating has cost, and what an alternative looks like. This is the starting point.

The Impact of Microplastics on Marine Ecosystems — Where the plastic in coastal water comes from, what it does when it gets into the food chain, and what the research actually shows. GRP hull abrasion, antifouling particle release, and synthetic rope and fabric shedding are all covered.

The Brutal Reality of Disposing of Fibreglass Boats — The end-of-life problem for GRP hulls is not theoretical. It is sitting in boatyards around the UK coast right now: thousands of vessels that cannot be recycled, cannot safely be incinerated, and are too expensive to landfill. This is where the material choices made in the 1960s have landed.

The True Environmental Impact of Boating — A full-spectrum look at what recreational boating costs the marine environment across hull materials, propulsion, maintenance chemistry, and use patterns. The honest version of the calculation most boat owners haven't done.

Boat Carbon Footprint — The carbon accounting in detail: manufacture, use-phase emissions, maintenance inputs, and end-of-life disposal, compared across hull materials and propulsion types.

Series Two: Sustainable Small Boat Design

If the first series is the problem, this is the response. The question I started VAKA to answer was whether a small sailing craft could be built and used without any of the inputs that make conventional boating ecologically damaging — no GRP, no epoxy, no antifouling, no engine. The answer turned out to be yes, without meaningful compromise on sailing performance for the kind of coastal and inshore work these boats are designed for.

The posts in this series cover the design principles and material choices that make that possible, and they connect back to the natural marine adhesives knowledge base that underpins the construction approach. Also in progress are a series of notes on natural material preservation.

The Plastic-Free Boat: A Complete Guide — The series hub: what plastic-free small craft construction actually means from hull to fitting out, and why the answer to the industrial boating problem starts with the material list.

Sustainable Boat Design — What sustainable design means in practice, from hull form to construction method to maintenance philosophy, and how skin on frame construction answers the question that GRP construction cannot.

Are Boats Eco-Friendly? — An honest answer to the question, working through hull materials, adhesives, propulsion, antifouling, and end-of-life disposal. Most boats are not. The post explains what would need to be true for the answer to be yes.

Eco-Friendly Boat Materials — The practical material stack for natural construction: timber species and sourcing, natural canvas and linen, plant-based treatments, and where flax fibre composites and bio-based resins fit for builders not ready to go full skin on frame.

Biodegradable Boats — End-of-life is where the environmental argument for natural construction is most clear-cut. A skin on frame hull built from natural materials composts. A GRP hull does not. This post covers what that means in practice and what it requires of the design from the outset.

Series Three: Citizen Conservation

This series is in progress. It documents the monitoring and reporting work that can be done from a small sailing vessel by someone paying attention — Secchi depth readings, water quality tests, wildlife encounter records, invasive species sightings, bioluminescence observations. Not citizen science as a gesture, but as a genuine contribution to datasets that professional monitoring cannot produce at the spatial and temporal resolution that repeated coastal passage allows.

The argument for this work is simple: the problems described in the first series are ongoing, and most of them are inadequately monitored. A sailor who covers the same inshore ground regularly, uses consistent methodology, and submits data to the right organisations is producing something that a quarterly research vessel survey cannot. The value is in the repetition and the consistency, not in any single observation.

Posts coming in this series:

Identifying and Reporting Invasive Species at Sea, River, and Lake — The species to know, the reporting pathways that work, and how to distinguish a genuine invasive from a native species you haven't seen before. Covers both marine invasives (wireweed, carpet sea squirt, Pacific oyster spread) and freshwater species relevant to anyone who also sails rivers and lakes (signal crayfish, floating pennywort, water primrose).

Secchi Depth: The Simplest Water Quality Instrument There Is — How to make a Secchi disk, how to take a reading properly, what the numbers mean, and where to submit them. Covers the historical context — Secchi depth records from the nineteenth century are some of the longest continuous water quality datasets we have — and the practical value of consistent readings from a repeatable route.

Water Sample Taking and Simple Home Tests — What a £30 testing kit can and can't tell you about the water you're sailing in. Covers nitrate and phosphate testing, pH, dissolved oxygen, and the difference between a single data point and a useful trend. Links to The Rivers Trust citizen monitoring programme and their submission methodology.

Night Sailing and Bioluminescence — What causes it, what different intensities and patterns suggest about plankton health and species composition, and how to record it in a way that is actually useful. Covers Noctiluca scintillans and other dinoflagellate species, the relationship between bioluminescence intensity and broader ecosystem conditions, and the observation protocols used by research programmes that accept citizen data.

The boat plans and the full Field Notes knowledge base connect everything on this site: the ecology, the construction, the materials, and the sailing. The boats are the instrument. The water is the subject.