Two Minutes of Your Time.
Real Data for Safety at Sea.
21 timed challenges and 3 in-depth surveys measuring how sailors respond to alarms, make decisions, and maintain attention under pressure. No signup. No email. Just play.
Part of the Marine Alert Fatigue Study — published preprint
Start with a 5-minute survey
Four self-assessments. Each one gives you an instant personalised readout — and adds a real data point to our next paper.
Why two minutes?
Measuring reaction time takes more than a single click. To separate real performance from noise, each challenge needs enough trials — 30 reaction-time measurements, 55 alarm responses, or 75 auditory signals — run under timed pressure. Two minutes is the shortest window that produces meaningful cognitive data.
That is what we are asking for. Two minutes, played on your phone or laptop, wherever you are. You get an instant score compared to other sailors. We get anonymised data that feeds ongoing research on how alert fatigue affects decision-making at sea.
What we measure
Each challenge targets a specific cognitive dimension affected by alert fatigue. Together, they map how alarm exposure degrades performance across six areas:
Can you tell critical alarms from routine ones when the signals are similar?
Can you maintain focus through a monotonous stream and detect the moment something changes?
How quickly do you respond to an alarm — and does that speed hold up over a sustained session?
Can you hold a mental picture of what is around you when the instruments go dark?
When multiple alerts fire at once, can you identify the one that matters most — and act on it first?
After dozens of false alarms, do you still respond to the real one? The cry wolf effect is measurable.
Young sailors tend to have faster reflexes. Experienced sailors know the answers. Find out where you stand — then challenge your crew, your family, your whole boat.
All ages welcome. Every result contributes to real research on safety at sea.
Keep a weather eye
We publish new research, add new challenges, and are building safety tools designed specifically for sailors. If that sounds useful, join the list.
- New challenge alerts — be the first to play
- Research findings as they are published
- Early access to the safety products we are developing
No spam. Unsubscribe anytime. We send about 2 emails per month.
Your Data
What we collect
- Quiz scores and response accuracy
- Response times per item
- Total completion time
- Browser language
- Email address (only if you choose to join — for research updates, new challenges, and early access to safety tools we are building for sailors)
What we do not collect
- No IP addresses stored
- No cookies used
- No personal identification without consent
- No data sold to third parties
- No account or login required
All participation is voluntary and anonymous. Email collection is optional and governed by our privacy policy in compliance with GDPR. Aggregate results may be published in academic journals.
The Research
Zucchelli, P. & Smith, N. (2026). The Science of Fatigue at Sea: A Biomathematical Model for Recreational Sailing. Preprints.org.
Read on our site | DOI: 10.20944/preprints202603.1014.v2
Zucchelli, P. & Smith, N. (2026). Multi-Day Fatigue at Sea: A Two-State Biomathematical Model for Recreational Passage-Making. Preprints.org.
Read on our site | DOI: 10.20944/preprints202604.1649.v2
Original music by Oliver Smith.
Disclaimer: These challenges and surveys are designed for research, education, and entertainment purposes only. They are not a substitute for formal maritime training, certification, or professional safety assessments. Always follow the training and qualification requirements of your flag state and relevant maritime authorities. If in doubt, seek professional instruction.