For clubs, schools and blogs

Put free sailing tools on your website

Give your members a radar simulator, a buoyage quiz, a tide calculator or a knot guide without building anything. Each tool runs in a small window on your page, with a credit link back to learntosail.io underneath.

Tide calculator

Height of tide at any hour with the rule of twelfths, plotted on a tidal curve.

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Embed this tide calculator on your site

Free for sailing clubs, schools and blogs. Paste this into your page; it works on any site that allows HTML.

<iframe src="https://learntosail.io/embed/tide-calculator" title="Tide calculator" width="100%" height="900" loading="lazy" style="border:1px solid #d8dee4;border-radius:8px;max-width:100%"></iframe>
<p style="font-size:13px">Free <a href="https://learntosail.io/tools/tide-calculator">tide calculator</a> from learntosail.io</p>

Sailing knot guide

Eight essential knots, photographed and animated step by step.

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Embed this sailing knot guide on your site

Free for sailing clubs, schools and blogs. Paste this into your page; it works on any site that allows HTML.

<iframe src="https://learntosail.io/embed/knot-guide" title="Sailing knot guide" width="100%" height="900" loading="lazy" style="border:1px solid #d8dee4;border-radius:8px;max-width:100%"></iframe>
<p style="font-size:13px">Free <a href="https://learntosail.io/tools/knot-guide">sailing knot guide</a> from learntosail.io</p>

COLREGs lights and signals trainer

Who gives way, navigation lights from every angle, and sound signals.

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Embed this colregs lights and signals trainer on your site

Free for sailing clubs, schools and blogs. Paste this into your page; it works on any site that allows HTML.

<iframe src="https://learntosail.io/embed/colregs" title="COLREGs lights and signals trainer" width="100%" height="900" loading="lazy" style="border:1px solid #d8dee4;border-radius:8px;max-width:100%"></iframe>
<p style="font-size:13px">Free <a href="https://learntosail.io/tools/colregs">colregs lights and signals trainer</a> from learntosail.io</p>

Phonetic alphabet trainer

Alfa to Zulu, radio numbers, and spelling boat names for the VHF.

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Embed this phonetic alphabet trainer on your site

Free for sailing clubs, schools and blogs. Paste this into your page; it works on any site that allows HTML.

<iframe src="https://learntosail.io/embed/phonetic-alphabet" title="Phonetic alphabet trainer" width="100%" height="800" loading="lazy" style="border:1px solid #d8dee4;border-radius:8px;max-width:100%"></iframe>
<p style="font-size:13px">Free <a href="https://learntosail.io/tools/phonetic-alphabet">phonetic alphabet trainer</a> from learntosail.io</p>

Sail trim guide

Sail plan and trim settings for any wind speed and point of sail.

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Embed this sail trim guide on your site

Free for sailing clubs, schools and blogs. Paste this into your page; it works on any site that allows HTML.

<iframe src="https://learntosail.io/embed/sail-trim" title="Sail trim guide" width="100%" height="900" loading="lazy" style="border:1px solid #d8dee4;border-radius:8px;max-width:100%"></iframe>
<p style="font-size:13px">Free <a href="https://learntosail.io/tools/sail-trim">sail trim guide</a> from learntosail.io</p>

Weather School game

Learn clouds from real photos, then fronts, synoptic charts and forecasting across seven levels.

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Embed this weather school game on your site

Free for sailing clubs, schools and blogs. Paste this into your page; it works on any site that allows HTML.

<iframe src="https://learntosail.io/embed/weather-school" title="Weather School game" width="100%" height="1100" loading="lazy" style="border:1px solid #d8dee4;border-radius:8px;max-width:100%"></iframe>
<p style="font-size:13px">Free <a href="https://learntosail.io/tools/weather-school">weather school game</a> from learntosail.io</p>

Radar simulator

Set gain and clutter, measure with the EBL and VRM, identify echoes and spot collision risk in twelve missions.

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Embed this radar simulator on your site

Free for sailing clubs, schools and blogs. Paste this into your page; it works on any site that allows HTML.

<iframe src="https://learntosail.io/embed/radar" title="Radar simulator" width="100%" height="1300" loading="lazy" style="border:1px solid #d8dee4;border-radius:8px;max-width:100%"></iframe>
<p style="font-size:13px">Free <a href="https://learntosail.io/tools/radar">radar simulator</a> from learntosail.io</p>

Weather and radar ID game

Twenty random questions a round on using the weather tools and the radar, with every picture taken from the real tools.

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Embed this weather and radar id game on your site

Free for sailing clubs, schools and blogs. Paste this into your page; it works on any site that allows HTML.

<iframe src="https://learntosail.io/embed/weather-radar-id" title="Weather and radar ID game" width="100%" height="1000" loading="lazy" style="border:1px solid #d8dee4;border-radius:8px;max-width:100%"></iframe>
<p style="font-size:13px">Free <a href="https://learntosail.io/tools/weather-radar-id">weather and radar id game</a> from learntosail.io</p>

Buoyage and day shapes quiz

Name the mark, pick the safe side, read cardinal lights at night and vessel day shapes.

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Embed this buoyage and day shapes quiz on your site

Free for sailing clubs, schools and blogs. Paste this into your page; it works on any site that allows HTML.

<iframe src="https://learntosail.io/embed/buoyage" title="Buoyage and day shapes quiz" width="100%" height="950" loading="lazy" style="border:1px solid #d8dee4;border-radius:8px;max-width:100%"></iframe>
<p style="font-size:13px">Free <a href="https://learntosail.io/tools/buoyage">buoyage and day shapes quiz</a> from learntosail.io</p>

Portland plotter trainer

A digital Portland plotter and dividers on a practice chart: bearings, distances, fixes and EPs.

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Embed this portland plotter trainer on your site

Free for sailing clubs, schools and blogs. Paste this into your page; it works on any site that allows HTML.

<iframe src="https://learntosail.io/embed/portland-plotter" title="Portland plotter trainer" width="100%" height="1150" loading="lazy" style="border:1px solid #d8dee4;border-radius:8px;max-width:100%"></iframe>
<p style="font-size:13px">Free <a href="https://learntosail.io/tools/portland-plotter">portland plotter trainer</a> from learntosail.io</p>

Chart symbols quiz

Wrecks, rocks, tidal diamonds and chart abbreviations, as a quiz or flashcards.

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Embed this chart symbols quiz on your site

Free for sailing clubs, schools and blogs. Paste this into your page; it works on any site that allows HTML.

<iframe src="https://learntosail.io/embed/chart-symbols" title="Chart symbols quiz" width="100%" height="950" loading="lazy" style="border:1px solid #d8dee4;border-radius:8px;max-width:100%"></iframe>
<p style="font-size:13px">Free <a href="https://learntosail.io/tools/chart-symbols">chart symbols quiz</a> from learntosail.io</p>

Say Again? VHF listening game

VHF calls, call signs and MMSIs through static, fading, engine noise, wind and overtalk. Four levels, up to typing what you heard.

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Embed this say again? vhf listening game on your site

Free for sailing clubs, schools and blogs. Paste this into your page; it works on any site that allows HTML.

<iframe src="https://learntosail.io/embed/say-again" title="Say Again? VHF listening game" width="100%" height="950" loading="lazy" style="border:1px solid #d8dee4;border-radius:8px;max-width:100%"></iframe>
<p style="font-size:13px">Free <a href="https://learntosail.io/tools/say-again">say again? vhf listening game</a> from learntosail.io</p>

Please keep the credit link under the tool. Something not fitting your site? See the FAQ or adjust the height in the code.