45:["$","title",null,{"children":"Route du Rhum 2026 | Christophe Yamahata | Observable"}] 4d:T47c,viewof display_inspect = { const el = htl.html`

Variables & Functions

⇣ Check to inspect the script

`; const checkbox = el.querySelector("input"); const spacer = el.querySelector("div"); function update() { const show = checkbox.checked; document.querySelectorAll(".observablehq--inspect").forEach(node => { if (el.contains(node)) return; node.style.display = show ? "" : "none"; }); spacer.style.height = show ? "0" : "20vh"; } checkbox.addEventListener("change", update); // Keep watching the DOM for new inspectors const observer = new MutationObserver(update); observer.observe(document.body, { childList: true, subtree: true }); // Initial state update(); // Clean up when the cell is re-run invalidation.then(() => observer.disconnect()); return el; }4e:T529,function decodeHwx(input) { const buf = input instanceof Uint8Array ? input : new Uint8Array(input); if (buf.length < 4) return new Uint8Array(0); // Keystream generator (4 x 24-bit state) const st = [0x7bc495, 0x4557fa, 0xd56aaf, 0xff8040]; const step = () => { let tmp = st[0]; tmp ^= (tmp << 11) & 0xffffff; tmp ^= (tmp >> 8) & 0xffffff; st[0] = st[1]; st[1] = st[2]; st[2] = st[3]; st[3] ^= (st[3] >> 19) & 0xffffff; st[3] ^= tmp; }; const next = (v) => { const r = v ^ (st[0] & 0xff); step(); return r; }; for (let k = 0; k < buf[0]; k++) step(); const size = (next(buf[1]) << 16) + (next(buf[2]) << 8) + next(buf[3]); const out = new Uint8Array(size); let i = 4, o = 0; while (i < buf.length && o < size) { const flags = (buf[i] ^ (i & 0xff)) ^ 0xa3; i++; for (let bit = 7; bit >= 0; bit--) { if (i >= buf.length || o >= size) break; if ((flags & (1 << bit)) === 0) { out[o++] = next(buf[i++]); // literal } else { const b = next(buf[i]); const len = (b >> 4) + 3; const off = (((b & 0xf) << 8) | next(buf[i + 1])) + 1; i += 2; for (let j = 0; j < len && o < size; j++) { out[o] = out[o - off]; o++; } } } } return out; }4f:[{"id":"2ca5cce14bd5d4118797af7a7d54a66774188231f7c098da0eba9fd87b99416506f2daa0d70c31d5334057021d1157e2ed18fd700c52bccbd09eade2709c223d","href":"https://static.observableusercontent.com/files/2ca5cce14bd5d4118797af7a7d54a66774188231f7c098da0eba9fd87b99416506f2daa0d70c31d5334057021d1157e2ed18fd700c52bccbd09eade2709c223d","name":"tracker_config.hwx","type":"application/octet-stream","lastModified":1793550401503,"size":18528},{"id":"049ad344313f194b318df1a0ad86380dde987c3b566ba13bca9df63d4dda4d68a0153039511eb48a3b49cf8cacfa94a9df5d9d9229dee41d63f1459eb28eb11d","href":"https://static.observableusercontent.com/files/049ad344313f194b318df1a0ad86380dde987c3b566ba13bca9df63d4dda4d68a0153039511eb48a3b49cf8cacfa94a9df5d9d9229dee41d63f1459eb28eb11d","name":"tracker_live.hwx","type":"application/octet-stream","lastModified":1793569394337,"size":8209}] 49:{"id":"0b9727978c8c0cf5","slug":"route-du-rhum-2026","title":"Route du Rhum 2026","thumbnail":"ce9c1868ba2d56ac93782193542199f979a221f8192776a75d0aac38c8009a17","access_level":"public","create_time":"$D2026-11-01T15:31:50.311Z","update_time":"$D2026-11-01T22:23:09.349Z","view_time":null,"first_public_time":"$D2026-11-01T21:33:12.798Z","has_unpublished_edits":null,"fork":false,"stars":1,"starred":false,"owner":{"type":"team","id":"dd67891d326bcfb1","login":"christophe-yamahata","name":"Christophe Yamahata","avatar_url":"https://avatars-next.observableusercontent.com/8256ac716aa8395babba412b2835913d186874fa4190df57a4a28f2e60129876","tier":"starter_2024","bio":"","followed_by_you":false,"follows_you":false},"version":432,"publish_version":432,"role":null,"authored":false,"authors":[{"type":"individual","id":"06f083eba60f5a76","login":"christophe-yamahata","name":"Christophe Yamahata","avatar_url":"https://avatars-next.observableusercontent.com/8256ac716aa8395babba412b2835913d186874fa4190df57a4a28f2e60129876","tier":null,"bio":"","followed_by_you":false,"follows_you":false}],"members":[{"type":"team","id":"dd67891d326bcfb1","login":"christophe-yamahata","name":"Christophe Yamahata","avatar_url":"https://avatars-next.observableusercontent.com/8256ac716aa8395babba412b2835913d186874fa4190df57a4a28f2e60129876","tier":"starter_2024","role":"editor"}],"comments":[],"custom_thumbnail":true,"trashed":false,"lapsed":null,"subscribed":null,"forks":0,"collection":{"id":"a4317cf9df48c2f1","slug":"sandbox","title":"Sandbox","owner":{"id":"dd67891d326bcfb1","login":"christophe-yamahata","name":"Christophe Yamahata"}},"type":"notebook","body":{"titling":"auto","title":"Route du Rhum 2026","cells":[{"id":1,"value":"# Route du Rhum 2026\n\nThe 2026 edition of the legendary Route du Rhum, a transatlantic sailing race from Saint-Malo to Pointe-à-Pitre, started on November 1.\n\nLive data comes from the official website, routedurhum.com. The feed is lightly obfuscated, so it is decoded with a small parser based on this reverse-engineering article.\n\n---","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":33,"value":"viewof source = {\n const styles = html``;\n const input = Inputs.select(\n new Map([\n [\"Live data\", \"live\"],\n [`Stored file (${new Date(file.lastModified).toLocaleDateString(\"en-US\", {year: \"numeric\", month: \"long\", day: \"numeric\"})})`, \"stored\"]\n ]),\n {label: \"Source\"}\n );\n const container = html`

${styles}${input}

`;\n return Object.defineProperty(container, \"value\", {\n get: () => input.value,\n set: (v) => {\n input.value = v;\n container.dispatchEvent(new Event(\"input\", {bubbles: true}));\n }\n });\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":23,"value":"viewof cls = Inputs.select([\"All\", ...new Set(boats.map(b => b.class))], {label: \"Class\"})","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":24,"value":"Inputs.table(\n ranked.filter(d => cls === \"All\" || d.class === cls),\n {\n select: false,\n columns: [\"overall\", \"rank\", \"skipper\", \"name\", \"class\", \"dtf\", \"dtl\", \"speed\", \"vmg\", \"heading\", \"racestatus\"],\n header: {\n overall: html`Overall`,\n rank: html`Class
rank`,\n skipper: html`Skipper`,\n name: \"Boat\",\n class: \"Class\",\n dtf: html`To finish
(nm)`,\n dtl: html`To leader
(nm)`,\n speed: html`Speed
(kn)`,\n vmg: html`VMG
(kn)`,\n heading: html`Heading
(°)`,\n racestatus: \"Status\"\n },\n align: {\n overall: \"left\",\n rank: \"left\",\n dtf: \"left\",\n dtl: \"left\",\n speed: \"left\",\n vmg: \"left\",\n heading: \"left\"\n },\n width: {\n overall: 50,\n rank: 40,\n skipper: 140,\n name: 180,\n class: 90,\n racestatus: 42,\n \"*\": 64\n },\n rows: 25,\n }\n)\n","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":30,"value":"---\n\n### Useful links\n* Cartography: Route du Rhum (official website)\n* Wind map & weather forecast: windy.com\n* Extracting HWX data\n* https://carto.routedurhum.com/data/**tracker_live.hwx**
(Note: Browser blocks that fetch because the server doesn’t send CORS headers)","pinned":false,"hidden":false,"mode":"md","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":25,"value":"$4d","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":2,"value":"$4e","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":28,"value":"// Deno Deploy Worker\nbase = \"https://bare-crow-5275.cyamahat.deno.net\"","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":34,"value":"file = FileAttachment(\"tracker_live.hwx\")","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":29,"value":"data = {\n if (source === \"stored\") {\n const raw = await FileAttachment(\"tracker_live.hwx\").arrayBuffer();\n yield JSON.parse(new TextDecoder(\"utf-8\").decode(decodeHwx(raw)));\n return;\n }\n while (true) {\n yield (await fetch(`${base}/data/tracker_live.hwx`)).json();\n await Promises.delay(60000);\n }\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":31,"value":"ranked = d3.sort(latestNamed, d => d.dtf, d => d.rank)\n .map((d, i) => ({...d, overall: i + 1}))","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":16,"value":"config = FileAttachment(\"tracker_config.hwx\").arrayBuffer()","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":18,"value":"configDoc = new DOMParser().parseFromString(text_config, \"application/xml\")","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":17,"value":"text_config = new TextDecoder(\"utf-8\").decode(decodeHwx(config))","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":8,"value":"cols = data.reports.columns","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":12,"value":"rows = data.reports.history.flatMap(h =>\n h.lines.map(line => ({\n snapshot: h.id,\n date: new Date(h.date),\n ...Object.fromEntries(cols.map((c, i) => [c, line[i]]))\n }))\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":21,"value":"rowsNamed = rows.map(d => ({...d, ...boatMap.get(String(d.boat))}))","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":20,"value":"boatMap = new Map(boats.map(b => [b.boat, b]))","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":19,"value":"boats = Array.from(configDoc.querySelectorAll(\"boatclass\")).flatMap(cls =>\n Array.from(cls.querySelectorAll(\":scope > boat\")).map(b => {\n const crew = Array.from(b.querySelectorAll(\"crew > *\")).map(p => ({\n name: `${p.getAttribute(\"fname\")} ${p.getAttribute(\"lname\")}`,\n nat: p.getAttribute(\"nat\")\n }));\n return {\n boat: b.getAttribute(\"id\"),\n name: b.getAttribute(\"name\"),\n class: cls.getAttribute(\"name\"),\n skipper: crew.map(p => p.name).join(\" & \"),\n nat: crew.map(p => p.nat).join(\"/\"),\n color: \"#\" + b.getAttribute(\"trackcolor\"),\n hulls: +b.getAttribute(\"nbhulls\")\n };\n })\n)","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":26,"value":"latest = {\n const lastDate = d3.max(rows, d => d.date);\n return rows.filter(d => +d.date === +lastDate);\n}","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"},{"id":22,"value":"latestNamed = latest.map(d => ({...d, ...boatMap.get(String(d.boat))}))","pinned":false,"hidden":false,"mode":"ojs","author":"$undefined","summary":"$undefined","tool":"$undefined","providerMetadata":"$undefined","attachments":"$undefined","output":"$undefined","database":"$undefined"}],"files":"$W4f","stdlib":"2"}} 44:null